In reality the electrons andprotons carry electric charges ofequalstrength.If electrons are"electricity", then protons are"electricity" too.Now everyone will rightly tell methat the protons within wires cannot flow, while the electrons can. Question. Yes, this is true but only true for metals. Nope, wrong. Thisfundamental errorleads most peopleto imagine that electric currents arealwaysa flow of negative particles. Electronics teachers and authorsof textbooksare often chided for passing on an "error" to their students. What is electric generator? Domestic Electric circuits: In our houses, we receive AC electric power of 220 V with a frequency of 50 Hz. During your painful experience there obviously was a considerable current directed through your body. All metals are composed of positively charged atoms immersed in a sea of movable electrons. "To gain some insight, let's examine the details. Question. (a) Name four appliances wherein an electric motor is used as an importantcomponent. What is the function of an earth wire? Current is the flow of electrons so it should be -ve to +ve but conventionally it is taken to be positive to negative, high potential region to low potential region, electric current always flows fr positive terminal to negative terminal, Current flows from positive terminal to negative terminal, the direction of current is from negative to positive terminal but conventially it is from positive to negative terminal. Question. strength of the currentd. Identify the region where field is strongest and why? And that trick holds the answerto the question.Electric currents produce three main effects: magnetism, heating, and the voltage drop across resistive conductors. But due to inertia the coil Magnet continues to rotate along the same direction. (iii) Held stationary inside the coil?Answer: (i) Due to change in magnetic flux linked with coil, the galvanometer shows deflection (say towards right). (ii) the degree of deflection of the magnetic compass increases when the current through the conductor is increased. Now move the compass on the drawing board coinciding S-pole of the compass with the previous marked point of N of the needle and so on move forward from one end (N-pole) to the S-pole of the bar magnet. Magnetic field is directly proportional to current so magnetic field increases when current increases.b. (ii) No, the neutrons being electrically neutral does not constitute any current. Answer: Assertion (A): On changing the direction of flow of current through a straight conductor, the direction of a magnetic field around the conductor is reversed. [That is initially B1 had contact with X and B2 had contact with Y; now B1 has contact Split Rings or Phase Converter with has contact with X.] Question 3. (c) Advantages of parallel connection over series connection. Might we eventually start believing that this oversimplified concept of positive electric current is REAL? NCERT Extra Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers will help to score more marks in your CBSE Board Exams. In this way electric energy supplied to motor is converted into mechanical energy. There is apowerful flow of electric charge going through the battery, yet no individual electrons flow through the battery at all. Question. (a) the direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points (b) magnetic field lines are closed curves (ii) If stronger horse-shoe magnet is used then the displacement of rod AB will increase. Answer: If the pressure used is too high, the cost of generating it exceeds the price you can get for the extra ammonia produced.The catalystEquilibrium considerationsThe catalyst has no effect whatsoever on the position of the equilibrium. In nearly every situation they willtell us all we could ever want to know about flows of charged particles in any circuit. No two field lines can cross each other as at the point of intersection the compass needle would point towards two directions, which is not possible. However,no electronsflowed through your body at all. Answer: Magnetic field lines of the field produced by a current-carrying circular loop. If we did this, then"conventional current" would bemuch easier to accept, no? The direction of pressure flow is opposite to the direction of flow of water If the direction of current is reversed the deflection in the compass needle is also reversed.c. That means that the running costs of your plant are very high.The compromise200 atmospheres is a compromise pressure chosen on economic grounds. No google hits! According to Fleming's left-hand rule, the thumb points in the direction of the force exerted on the conductor, the forefinger points in the direction of the magnetic field, and the middle finger points in the direction of the current when the thumb, forefinger, and middle finger are held perpendicular to each other. At the centre of circular loop, the magnetic field lines are straight. Answer: idea that electric current is a flow of positive particles in one direction, when supposedly it's really a flow of negative electrons going the other way.In fact, the chiders are wrong. Whenever you connect a lightbulb to a battery, you form a complete circuit, and the path of the flowing charge isthroughthe inside of the battery, as well as through the light bulb filament and the connecting wires. (i) How is the direction of magnetic field at a point determined? While trying to understand electric circuits and electrical measurements, we need a simpleway to take measurements of this important entity named"Electric Current." Now pass a current through the aluminium rod from end B to end A. (a) Mention the factors on which the direction of force experienced by a current carrying conductor placed in a magnetic field will depend. The negative atoms behave like electrons which are dragging an entire atom alongwith them.So, inside humanflesh which direction did the electric current REALLY go? What is the direction of magnetic field lines outside a bar-magnet?b. If the current in the coil A is changed, will some current be induced in the coil B? Pass the current in the wire. Question 3. This ensures the safety of the user. Draw a diagram to show how a magnetic needle deflects when it is placed above or below a straight conductor carrying current depending on the direction of the current in the conductor.Answer: Question. As per Flemings right hand rule, induced current inthese arms along the directions AB and CD respectively and current flows into B1 and B2. But to measure currents, won't we first need to measure how much of the current is composed of negative particles going one way, and of positive particles the other? (a) What is the standard colour code followed for(i) live(ii) neutral and(iii) earth wires used in electric circuits? How does a current carrying solenoid behave? )Two-way currents are commonThere are many other places where these kinds of positive/negativecharge flows canbe found. Where it is connected in a circuit?Answer: An electric fuse is a safety device which is made up of a wire made of copper or aluminum or a tin lead alloy. Name the Largest and the Smallest Cell in the Human Body ? Answer:(a) These magnetic field lines are produced by a current carrying loop. An earth wire is a thick copper wire connected to a metalplate buried deep in the earth. (i) What is basic concept behind MRI? Let the current pass through the loop clockwise. (i) Split ring It reverses the dissection of current in the armature and thus direction of force is also reserved. And these three effectsdon't careabout the amounts of positive and negative particles, or about their speed, their mass, their charge, etc. There is a simple answer, but firstBatteries are another example of non-electron or "ionic" conductors. From N pole to S poleb. Increasing the strength of the magnetic field used. (b) Two coils P and S are wound over the same iron core. Suppose your science teacher asks you to demonstrate the phenomena of EMI with following materials:(a)Two different coils land 2 of copper wire having large no. Due to this increased current, the wires get heated. If a fuse is replaced by one with larger ratings, the appliances may get damaged while the protecting fuse does not burn off. As a result, Current begins to flow in coil along DCBA. And these three effectsdon't careabout the amounts of positive and negative particles, or about their speed, their mass, their charge, etc. The conventional current must be a flow of conventional charge, so first we should teach our students about the existence of oversimplified charges,"conventional charges," charges which we pretend are inside all the wires. The linkgives 16,000 google hits. (i) = 90, F = ? Two negatives make a positive.) On applying Flemings left-hand rule we find that force acting on arm AB due to magnetic field pushes it downwards. (b) The metallic case of an electrical appliance is earthed because metals are good conductors of electricity and in case if current exceeds i.e. If a hundred positive particles flow to the left per second, this givesexactlyas much magnetism, heating, and voltage as a hundrednegativeparticles flowing to the right per second. = BA cos = 2 10-2 0.9 cos 90 0 (ii) used in electric bells. set up in the coil when there is a relative motion(3) What may be the cause of production of that physical quantity?Answer:(1) Electromagnetic induction(2) Induced current(3) Change in magnetic lines of forces through coil. We might start tosee "Electric Current" itself as a sort of abstract,invisible, difficult-to-imagine thing. Magnetic field lines are the imaginary lines drawn in a magnetic field along which a north magnetic pole would move. State the consequences that can lead to a short circuit. This is due to the reason that electric current can be produced with the help of varying magnetic field without any physical contact of the source of magnetic field and the conductor. They are very common, they allaround us; as close to us as they can possiblybe.Non-electron Charge-flowFor example, if you were to poke your fingers into the back of an old-style television set, you would suffer a dangerous or lethal electric shock. (ii) current continues to flow in coil P.(iii) current in coil P is stopped by removing the key.Explain the reason for such observations.Answer:a. We don't care about their speed, and we don't care about their number. Magnetic field: The phenomenon in which a changing magnetic field in a coil induces a current in another coil kept near it. distance of point P from the coil?c. (ii) Due to change in magnetic flux linked with coil, the galvanometer shows deflection (say towards left opposite to that in case one). Watch the video to know why? And sometimes the currentsare both positive andnegative particles flowing at once, but in opposite directions within the same conductor.We cannot arbitrarily proclaim which way the charges"flow," sincetheir true direction always depends on the type of conductive material.Electricity ismore than just electrons"Electricity" is not made of electrons(or to be more specific, Electric Charge, which is sometimes called"Quantity of Electricity," is not made of electrons.) It has potassium hydroxide added to it as a promoter - a substance that increases its efficiency.The pressureThe pressure varies from one manufacturing plant to another, but is always high. Put the compass at some other points near the N-pole of the magnet and draw another magnetic field lines. The nitrogen and hydrogen remain as gases even underthese high pressures, and can be recycled. Answer: Discover the top 100 medical technologies, breakthroughs, trends in healthcare, and biohacks you might not have known about in 2022 with Better Health . Magnetic field has both direction and magnitude. A magnetic compass shows a deflection when placed near a current-carrying wire. Yet it's not real, it's simply one way to simplify things. Orvice versa, following the positives? If a fuse is replaced by one with larger ratings, the appliances may get damaged while the protecting fuse does not burn off. By convention, we define the flowing charges to be positive. During your electrocution, it was these charged atoms which flowed along as an electric current. c. Using a fuse in a household . Mention the special feature regarding shape of magnetic field lines.Answer:Magnetic field lines are continuous closed loops. (grin! Support your answer with a reason. Let initially coil ABCD be horizontal as shwon in Fig. Magnetic Effects of Electric Current Class 10 MCQs Questions with Answers Question 1. The direction of electric current is opposite to the direction of electrons, it looks that you don't have book so buy physics school book from nearby book shop instead of asking these stupid question and checking everyone's knowledge, from high potential to low potential i.e from +ve to -ve, really but why it is taken from positive to negative terminal it is said that the direction of flow of positive charge is same the direction of current but actually it is said that positive charges cannot move so why it is taken, The flowing of charge positive terminal to the negative terminal, direction of electric current is from positive terminal to negative terminal, There is no direction for electricity that is why it is a scalar product, electric current flow through the conductor from positive to negative. Question. Theylabor under the misconception that"Electricity" is made of negatively-charged particles called electrons. It can deflect either to the left or to the right of the zero mark depending on the direction of current. The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. (iii) As it is stationary no change in magnetic flux linked with coil, so galvanometer shows no deflection. Theylabor under the misconception that"Electricity" is made of negatively-charged particles called electrons. However,no electronsflowed through your body at all. Ourown nervous system is based on the two-way currents. Nursing, Choosing A Career Essay | Essay on Choosing A Career for Students and Children in English, Vocational Education Essay | Essay on Vocational Education for Students and Children in English, 10 Lines on Healthy Food for Students and Children in English, Motivational Quotes for Medical Students | Inspirational Quotes for Med School, Nursing School or PT School Students, MEC Courses List | Check Mathematics, Economics, and Commerce Subjects, Top Institutes, Jobs, Scope for Arts & Commerce Students, Courses after BA | After BA What I Can do? 18. Down inside the battery, within the wet chemicals between the two plates, the amperes of flashlight currentappears as a flowof both positive and negative atoms. But the"electricity" in common electrical devices is limited to positive protons andnegative electrons. (This figure also varies from plant to plant.) Why does a current carrying conductor kept in a magnetic field experience force? Question. Question 9. When it is placed in a magnetic field then both fields interact each other, and current carrying conductor experience a force.Flemings left hand rule: If we stretch right hand thumb, forefinger and middle finger perpendicular to each other in such a way that forefinger points the direction of magnetic field, middle finger points the direction of current, then thumb will point the direction of force on the conductor. Horizontal component of earths magnetic field at a place is uniform and its direction is south to north. Battery electrolyte is veryconductive. How is the strength of magnetic field near a straight current-conductor (i) related to the strength of current in the conductor? Given: i= 1A, l = 1 m, B = 2 N/A-m Now take a bar magnet and a compass.Place the magnet at the middle of the paper and mark its boundary with the help of pencil. (And if we should builda circuit entirely out of hoses full of salt water, withno metal conductors used,thenallthe current would be bi-directional. The real charges are too complicated to deal with, and theadded complexity gets us very little information as long as we're only interested involtage drop, magnetic fields, and heating.Particle-flow is real, "Amperes" are notOnce we start ignoring the speed and direction of the charges, then we can easily build electrical instruments or"amp meters" which measure the Conventional Electric Current in terms of the magnetism which the charge-flow creates or by the voltage drop which appears across a resistor,or by the temperature rise being created in a calibrated pieceof resistance wire. Construction. Electric current can be complicated!However, there isa cute trick we can pull in order to avoid having to look at the particles at all. What is the frequency of current in case (b) in our country?d. The populations of little dots move through each other without any dots colliding. It cannot detect real current, instead itonly measures our conventionally-defined simple current. State the observation made by Oersted on the basis of his experiment with current carrying conductors.Answer:A magnetic field is produced near a current carrying conductor which last so long till there is current in the conductor on reversing the current the direction of magnetic field is also reversed. (This figure also varies from plant to plant.) Question. An amp-meter mightnot be appropriate whenused in an exotic physics experiment. Ammonia is easily liquefied under pressure as long as it isn't too hot, and so the temperature of the mixture is lowered enough for the ammonia to turn to a liquid. Hence, Alternating Current is produced State one main difference between A.C and D.C. Why A.C is preferred over D.C for long range transmission of electric power? Two coils A and B of insulated wires are kept close to each other. While trying to understand electric circuits and electrical measurements, we need a simpleway to take measurements of this important entity named"Electric Current." When current passes through the coil, it flows in arms CB and AD in a direction perpendicular to the magnetic field. Flemings left hand rule. Nobody talks about the "Conventional Charge!" Due to rotation of coil, its shaft gains kinetic energy; which may be used to run electric fan, water pump, washing machine, mixer and grinder etc. State the condition for electromagnetic induction to take place. State the function of (i) split ring (ii) field magnet used in electric motor.Answer:Electric motor works on the principle that a current carrying conductor placed perpendicular to a magnetic field experiences a force. And sometimes the currentsare both positive andnegative particles flowing at once, but in opposite directions within the same conductor.We cannot arbitrarily proclaim which way the charges"flow," sincetheir true direction always depends on the type of conductive material.Electricity ismore than just electrons"Electricity" is not made of electrons(or to be more specific, Electric Charge, which is sometimes called"Quantity of Electricity," is not made of electrons.) (c) When I increase, force increases and hence displacement increases. What is direction of electric current?, a detailed solution for What is direction of electric current? A fuse is usually made of tin or tin-copper alloy because it has a low melting point. How many times does AC used in India change direction in one second? CBSE CLASS 10 SCIENCE ELECTRICITY QUESTIONS Q.1. Draw a diagram to represent it.Answer:The uniform magnetic field is represented by parallel equispaced lines of equal length as follows: Question. (vi) Tap the cardboard gently a few times. (iii) Take care that cardboard is fixed and does not slide up or down. Draw the pattern of field lines due to a solenoid carrying electric current. (grin! Answer: What is the pattern of magnetic field around a current carrying conductor? And these three effectsdon't careabout the amounts of positive and negative particles, or about their speed, their mass, their charge, etc. The catalyst ensures that the reaction is fast enough for a dynamic equilibrium to be set up within the very short time that the gases are actually in the reactor.Separating the ammoniaWhen the gases leave the reactor they are hot and at a very high pressure. Answer the following questions: "To gain some insight, let's examine the details. the degree of deflection of the magnetic compass increases when the current through the conductor is increased.Which of the above observations of the student appears to be wrong and why?Answer:The first statement is wrong because the strength of magnetic field decreases when we move away from a current carrying conductor. Which effect of electric current is utilised in the working of an electric fuse? How many times does AC used in India change direction in one second? This happens due to the damage in insulation of the power lines.Safety measure device: Fuse.Working principle of fuse: It works on the heating effect of electric current or Joules law of heating.According to this law, the heat produced in a resistor is directly proportional to the (i) square of current for a given resistance. 2. It is shown by the deflection in galvanometer. When key is closed, the current begins to flowi n the coil. (b) Why is it preferred over the other type? On reversing the direction current, it will turn to 180 because its polarity will be reversed. . What is a solenoid? A coil of insulated wire is connected to a galvanometer.Explain what happens if a bar magnet with its north pole towards one face of the coil is:a. moved quickly towards the coil,b. When an electric current is createdwithin a solid copper wire, the"electron sea" moves forward, but the protons within the positive atoms ofcopper do not.However,solid metals are not the only conductors,and in many other substances the positive atoms*do* move, and they *do* participate in the electric current. In which direction does electric current flow? On what factors does the direction of this force depend? This is known as electromagnetic induction. Again mark the position of the other end (N-pole) of the compass needle. piya u r right like charges are attract and unlike charges are repellent. So force F increase. Nobody talks about the "Conventional Charge!" Do we follow the negative particles and ignore the positive ones? Question. (ii) The direction of magnetic field at the centre of a current-carrying circular loop is perpendicular to the plane of the loop. An amp-meter mightnot be appropriate whenused in an exotic physics experiment. (b . The electric charges in a human body are entirely composed of positive and negative chargedatoms or "ions." Theylabor under the misconception that"Electricity" is made of negatively-charged particles called electrons. Answer:(i) Take a rectangular cardboard having two holes. The system will respond by moving the position of equilibrium to counteract this - in other words by producing more heat.In order to get as much ammonia as possible in the equilibrium mixture, you need as low a temperature as possible. (i) maximum force Therefore, as far as most electrical devicesand circuits are concerned, it makes no difference if the current is made of positive particles going one way, or negative particles going the other or halfas many negatives flowingbackwards through a crowd of half as many positives.Put simply, the"Ampere" doesn't care about the direction or speed of the flowing particles.So, in order to simplify our measurements and our mental picture of ElectricCurrents, we cut away the unused parts of the picture. State one advantage of ac over dc.Answer:a. has been provided alongside types of What is direction of electric current? Which of the above observation of the student appears to be wrong and why? Increasing the rate of change of magnetic flux associated with the coil. We don't care about the real polarity of the particles. Take a small aluminium rod AB (of about 5 cm). When is the force experienced by a current-carrying conductor placed in magnetic field largest?Answer: The force experienced by a current carrying conductor placed in a magnetic field is largest when the conductor is placed with its length in a direction perpendicular to that of magnetic field. These various conductors are nothing exotic. The direction of the magnetic field at a point can be found by placing a small magnetic compass at that point. (c) No, force is exerted by a proton beam because proton beam is moving along the direction of magnetic field. That means that the gases are going into the reactor in the ratio of 1 molecule of nitrogen to 3 of hydrogen.That is the proportion demanded by the equation.In some reactions you might choose to use an excess of one of the reactants. And that trick holds the answerto the question.Electric currents produce three main effects: magnetism, heating, and the voltage drop across resistive conductors. What is the function of brushes? )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." Describe domestic electric circuits. Question. (ii) Insert a circular coil through these holes, normal to the plane of paper. Magnetic field due to current in a solenoid. We makethe negative particles positive,then add their current to any positive particles which were flowing forward. However,no electronsflowed through your body at all. During your electrocution, it was these charged atoms which flowed along as an electric current. What force is acting on proton beam? How would the strength of the magnetic field produced at the centre of the circular loop be affected ifa. (grin! Question. The magnitude of the magnetic field produced at a given point increases as the current through the wire increases. )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." That means that the gases are going into the reactor in the ratio of 1 molecule of nitrogen to 3 of hydrogen.That is the proportion demanded by the equation.In some reactions you might choose to use an excess of one of the reactants. List three factors which may lead to the short circuit.Answer: It occurs as a consequence of failure of electrical insulations due to which live wire comes in direct contact with neutral or earth wire.presence of external conducting material such as water which is introduced accidentally into the circuit.electrical appliances are forced to operate when its moving parts are jammed.connection of current carrying parts of electrical equipments comes in contact to one another due to human or natural cause and use of less rating wires.When this happens, there is an excessive electric current which can damage the circuit and may also cause electrical fires. Question. (b) Principle of working of electric motor: A currentcarrying coil placed in a magnetic field experience a torque. 1. The magnet so formed is called an electromagnet. If the direction of current is reversed the direction of magnetic field is also reversed. That means that the gases are going into the reactor in the ratio of 1 molecule of nitrogen to 3 of hydrogen.That is the proportion demanded by the equation.In some reactions you might choose to use an excess of one of the reactants. Now the deflection is towards north, so the force is towards north. (And if we should builda circuit entirely out of hoses full of salt water, withno metal conductors used,thenallthe current would be bi-directional. Question. We have listed 100 of the most interesting health topics in 2022. A coil made of insulated copper wire is connected to a galvanometer. In reality the electrons andprotons carry electric charges ofequalstrength.If electrons are"electricity", then protons are"electricity" too.Now everyone will rightly tell methat the protons within wires cannot flow, while the electrons can. This wastes reactor space - particularly space on the surface of the catalyst.The temperatureEquilibrium considerationsYou need to shift the position of the equilibrium as far as possible to the right in order to produce the maximum possible amount of ammonia in the equilibrium mixture.The forward reaction (the production of ammonia) is exothermic.According to Le Chatelier's Principle, this will be favoured if you lower the temperature. Tap the board gently. It won't paint the correct picture when designing electron beams inside vacuum tubes, or ion flows in nerve fibers. (viii) Ensure the copper wires placed remains vertically straight. By convention, we define the flowing charges to be positive. direction of electric current is opposite to direction of flow of electron mean electron move from (-)ive terminal to (+)ive so direction of current will be (-) to Upvote | 2 Reply Sachin Sharma Jun 22, 2017 from positive to negative Upvote | 2 Reply Sid Oct 17, 2017 direction of electric current is opposite to direction of holes Upvote | 2 Reply But to measure currents, won't we first need to measure how much of the current is composed of negative particles going one way, and of positive particles the other? We makethe negative particles positive,then add their current to any positive particles which were flowing forward. F = ilB sin = 1 1 2 sin 90 = 2 N Name and state the phenomenon responsible for the above observation. (ii) The deflection in the magnetic needle will increase as the strength of current increases. The magnetic force on the electron will act (a) vertically upwards. Hence displacement increases. We mightlose track of the fact that there are real, visible particles flowing along inside that circuit, or that these particles have an actual average speed, mass, and direction.Because"amperes" are so incredibly useful, the simplified interpretation of Current takes over and becomes more real than reality. Thisfundamental errorleads most peopleto imagine that electric currents arealwaysa flow of negative particles. (ii) The number of turns in the solenoid(iii) Nature of core on which wires are wound in solenoid. Answer: The tangent at any point on the magnetic field line gives the direction of magnetic field at that point. (c) (i) Armature: The soft iron core on which the coil is wound along with coils is called armature which enhances the power of motor. The electric charges in a human body are entirely composed of positive and negative chargedatoms or "ions." These three effects cover almost everything we encounter in electronics. Q.3. The relative strength of the magnetic field is shown by degree of closeness of the field lines. (ii) (a) Yes, alpha particle being positively charged constitutes a current in the direction of motion. Hence, current flows from Brush Y , moves along galvanometer and finally enters X Hence, we say current flows from Y to X in the external circuit. )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." All metals are composed of positively charged atoms immersed in a sea of movable electrons. Extra Questions On Magnetic Effect Of Electric Current Question 10. Application: Electrical generator. Whenever you connect a lightbulb to a battery, you form a complete circuit, and the path of the flowing charge isthroughthe inside of the battery, as well as through the light bulb filament and the connecting wires. Towards east c. Downward d. Upward Ans. (b) number of turns in the coil. The real charges are too complicated to deal with, and theadded complexity gets us very little information as long as we're only interested involtage drop, magnetic fields, and heating.Particle-flow is real, "Amperes" are notOnce we start ignoring the speed and direction of the charges, then we can easily build electrical instruments or"amp meters" which measure the Conventional Electric Current in terms of the magnetism which the charge-flow creates or by the voltage drop which appears across a resistor,or by the temperature rise being created in a calibrated pieceof resistance wire. Question. The alloy Alnico is used for making permanent magnets. When an electric current is createdwithin a solid copper wire, the"electron sea" moves forward, but the protons within the positive atoms ofcopper do not.However,solid metals are not the only conductors,and in many other substances the positive atoms*do* move, and they *do* participate in the electric current. (ii) Applying Fleming's Left hand rule to sides AB and CD of the coil, the force on side AB of the coil is in downward direction whereas the force on side CD of the coil is in upward direction. Therefore, as far as most electrical devicesand circuits are concerned, it makes no difference if the current is made of positive particles going one way, or negative particles going the other or halfas many negatives flowingbackwards through a crowd of half as many positives.Put simply, the"Ampere" doesn't care about the direction or speed of the flowing particles.So, in order to simplify our measurements and our mental picture of ElectricCurrents, we cut away the unused parts of the picture. Electric current can be complicated!However, there isa cute trick we can pull in order to avoid having to look at the particles at all. The real charges are too complicated to deal with, and theadded complexity gets us very little information as long as we're only interested involtage drop, magnetic fields, and heating.Particle-flow is real, "Amperes" are notOnce we start ignoring the speed and direction of the charges, then we can easily build electrical instruments or"amp meters" which measure the Conventional Electric Current in terms of the magnetism which the charge-flow creates or by the voltage drop which appears across a resistor,or by the temperature rise being created in a calibrated pieceof resistance wire. That will causethe pressure to fall again.In order to get as much ammonia as possible in the equilibrium mixture, you need as high a pressure as possible. (And if we should builda circuit entirely out of hoses full of salt water, withno metal conductors used,thenallthe current would be bi-directional. Answer: The conductor experiences a force and the direction of this force is given by Fleming's left hand rule. In which direction in this field forces an particle (+ve charged) be projected to that it is deflected southward? vertically downwards. (i) Yes, Alpha particles being positively charged constitute a current in the direction of motion. Question. Electric generator. What will happen if a current carrying conductor is placed in magnetic field? (b) Compare the strength of field near the poles and middle of a bar magnet.Answer:Ans :(a) More the density of the magnetic field lines i.e. idea that electric current is a flow of positive particles in one direction, when supposedly it's really a flow of negative electrons going the other way.In fact, the chiders are wrong. positive terminal to the negative terminal. All we care about is the total net charge which moves past a particular point in the circuit. In the following list of devices-materials, the electric charges found within the conductors are a combination of movable positive and negative particles. idea that electric current is a flow of positive particles in one direction, when supposedly it's really a flow of negative electrons going the other way.In fact, the chiders are wrong. Charge actually comes in two varieties: positive particles and negative. What happens to the deflection of the compass needle placed at a point near current carrying straight conductor:a. if the current is increased?b. Electric current = charge/time I = Q/T The orders of magnitude of some electric currents we come across in daily life are: Current in domestic appliances = 1 A Due to this, current carrying conducter experiences a force. Give its main use.Answer: Solenoid: A coil of many circular turns of insulated copper wire wound on a cylindrical insulating body (i.e., cardboard etc.) Down inside the battery, within the wet chemicals between the two plates, the amperes of flashlight currentappears as a flowof both positive and negative atoms. Question. Extra Questions Of Magnetic Effect Of Electric Current Class 10 Question 9. Question 4. Question. Why is the earth pin thicker and longer than the live and the neutral pins?Answer: it is thicker so that it does not enter into the live or neutral sockets. Question. What is the frequency of A.C. (alternating current) in India? The linkgives 16,000 google hits. This extreme heat may cause fire in the building. There is apowerful flow of electric charge going through the battery, yet no individual electrons flow through the battery at all. But the"electricity" in common electrical devices is limited to positive protons andnegative electrons. (2) No. It is possible only when conductor gets accelerated more each time which required more force. The conventional current must be a flow of conventional charge, so first we should teach our students about the existence of oversimplified charges,"conventional charges," charges which we pretend are inside all the wires. Class 10 Magnetic Effect Of Electric Current Extra Questions Question 3. | Best Courses & High Paying Jobs after Bachelor of Arts, How to become a Cricketer and make it your Career | Step by Step Guide to Join Indian Cricket Team, CA After Graduation Eligibility, Admission, Fees, Duration, Syllabus, Career Prospects, 10 Lines about Myself for Students and Children in English. Heating effect of current. (ii) Is there a similar magnetic field produced around a thin beam of moving:(a) alpha particles and (b) neutrons? Question. This wastes reactor space - particularly space on the surface of the catalyst.The temperatureEquilibrium considerationsYou need to shift the position of the equilibrium as far as possible to the right in order to produce the maximum possible amount of ammonia in the equilibrium mixture.The forward reaction (the production of ammonia) is exothermic.According to Le Chatelier's Principle, this will be favoured if you lower the temperature. Give reason for your answer.Answer:100 times in one second because one complete cycle involves two times change of direction. (b) Which source produces alternating current?Answer: Question. Question. What is meant of solenoid? (iii) The magnetic field produced will increase because magnetic field produced is directly proportional to the number of turns in the coil. In what respect it is different from generator? Question 15. When an electric current is createdwithin a solid copper wire, the"electron sea" moves forward, but the protons within the positive atoms ofcopper do not.However,solid metals are not the only conductors,and in many other substances the positive atoms*do* move, and they *do* participate in the electric current. During your electrocution, it was these charged atoms which flowed along as an electric current. The strength of magnetic field is directly proportional to the magnitude of current passing through the straight conductor. Youwould do this if it is particularly important to use up as much as possible of the otherreactant - if, for example, it was much moreexpensive. Let the axle attached to the rings is rotated such that arm AB of thecoil moves up and arm CD moves down in the magnetic field. The postive atoms behave like flowing protons, but protons with entire atoms attached. The two possible cause area. If more than $ 40W $ is applied, $ 60\% $ of the extra power is converted into light and rest into heat. (And if we should builda circuit entirely out of hoses full of salt water, withno metal conductors used,thenallthe current would be bi-directional. Coil P is connected to battery and key the coil S is connected to galvanometer. Question. By continual recycling of the unreacted nitrogen and hydrogen, the overall conversion is about 98%.Explaining the conditionsThe proportions of nitrogen and hydrogenThe mixture of nitrogen and hydrogen going into the reactor is in the ratio of 1 volume of nitrogen to 3 volumes of hydrogen.Avogadro's Law says that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. (ii) Fuse: It is also a safety device. Answer: coil so a current is induced in the coil so galvanometer gives a deflection.b. Q.5. (c) If a coil is rotated in a uniform magnetic field, Question. Answer:Electromagnetic inductiona. $ = BA cos = 2 10-2 0.9 cos 0 (b) Element of electric heater has high resistance and high melting point whereas a fuse wire has high resistance and low melting point. The higher the pressure the better interms of the rate of a gas reaction.Economic considerationsVery high pressures are very expensive to produce on two counts.You have to build extremely strong pipes and containment vessels to withstand the very high pressure. What is the difference between a direct current and an alternating current? Principle of electric generator. Strength of magnetic field is doubled when theradius of the loop is halved B 1/F, Question. His younger sister asked some questions and Ravi answered? Adding a catalyst doesn't produce any greater percentage of ammonia in the equilibrium mixture. Iron filings align themselves in a pattern of concentric circles around the copper wire, which represents the magnetic field lines. (iv) Connect the copper wire vertically between points X and Y as shown in diagram in series with battery, plug and a key. Answer: Outside the solenoid magnetic field is minimum. )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." Draw the pattern of lines of force due to a magnetic field through and around a current carrying loop of wire. ample number of questions to practice What is direction of electric current? [MORE ARTICLES HERE]Because the negative particles carry a name thatsoundslike"electricity," somebeginners unfortunately start thinking thatthe electrons ARE the electricity, and they wrongly imagining that the protons (having a much less electrical name?) (iii) If length of the rod is increased, force acting on it will increase and hence, displacement of the rod increases. What type of core is used to make electromagnets? Question 8. You can't go far wrong in an exam quoting 200 atmospheres.RecyclingAt each pass of the gases through the reactor, only about 15% of the nitrogen andhydrogen converts to ammonia. Short circuting: Whenever live and neutral wires come in contact with each other, the incident is called short circuiting. The nitrogen and hydrogen remain as gases even underthese high pressures, and can be recycled. The postive atoms behave like flowing protons, but protons with entire atoms attached. The metallic body of the electric appliance is connected to the earth wire, it provides a low resistance conducting path and leaked current goes todeep in the earth and human beings do not get a fatal electric shock. The conventional current must be a flow of conventional charge, so first we should teach our students about the existence of oversimplified charges,"conventional charges," charges which we pretend are inside all the wires. But for more than 99% ofelectricity and electronics, the direction of the particles is irrelevant, and anammeter tells us the so-called"real" current while hiding the true particle flows.Or to put it simply: we pretend that"electric currents"are always composed of POSITIVE particles of unknown speed, so that any negative currentsare defined as positive particles flowing backwards ratherthan negative particles flowing forwards.Confusing students for two hundred yearsWe do cause some problems by choosing a positive charge convention. (ix) Gently tap the iron filings. Answer: Current drawn by electric ovenCurrent rating of the circuit = 5 ASo, fuse will blow off and power supply will cut off. Electronics teachers and authorsof textbooksare often chided for passing on an "error" to their students. Calculate the force acting on the charge. It makes no sense to try to achieve an equilibrium mixture which contains a very high proportion of ammonia if it takes several years for the reaction to reach that equilibrium.You need the gases to reach equilibrium within the very short time that they will be in contact with the catalyst in the reactor.The compromise400 - 450C is a compromise temperature producing a reasonably high proportion of ammonia in the equilibrium mixture (even if it is only 15%), but in a very short time.The pressureEquilibrium considerationsNotice that there are 4 molecules on the left-hand side of the equation, but only 2 on the right.According to Le Chatelier's Principle, if youincrease the pressure the system will respond by favouring the reaction which produces fewer molecules. 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