That doesn't apply in this case.There is always a down-side to using anything other than the equation proportions. Heating effect of currentb. On which factors does the magnetic field produced by a current carrying conductor at a given point depend? This practice of using fuse of improper rating should always be avoided. 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. Magnetic field lines of a current carrying circular loop.b. )PSThis over-simplified fake electric current measured by ammeters is commonly called"Conventional Current." The populations of little dots move through each other without any dots colliding. )Two-way currents are commonThere are many other places where these kinds of positive/negativecharge flows canbe found. An amp-meter mightnot be appropriate whenused in an exotic physics experiment. What precaution should be taken to avoid the overloading of domestic electric circuit?Answer:We should take following precaution to avoid the overloading of domestic electriccircuit:(a) Two separate circuits should be used, one of 5A current rating of bulbs, fans, tubes etc.and the other 15 A current rating for appliances with higher current rating such as geysers, air coolers, electric iron, electric stoves etc. (b) Magnetic field lines are closed continuous curves. The phenomenon in which a changing magnetic field in a coil induces a current in another coil kept near it. The degree of closeness of the field lines in a magnetic field indicates the strength of magnetic field in the region. The postive atoms behave like flowing protons, but protons with entire atoms attached. are not electrical. The field is uniform inside the solenoid. The two ends of the armature ABCD are connected to two metallic rings S1 and S2. Answer: 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. (c) A fuse of appropriate current rating should be used with the electric circuit. (b) (i) No two magnetic field lines intersect with each other at any point. Can a freely suspended current carrying solenoid stay in any direction? Why is it necessary to earth the electric appliances having metallic body? The supply voltage is 220 V.Answer:I =Total Power/V=nP /V=2 X 1.1kW/220V=2 X 1.1 X 1000 /220V W= 10 ASo a fuse wire of rating must be greater than 10 A. 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. "To gain some insight, let's examine the details. (i) The direction of the magnetic field at a point can be found by placing a small magnetic compass at that point. This phenomenon is called electromagnetic induction (EMI). If the direction of current is reversed then the polarity of the magnet will change and hence will rotate through an angle of 180. In activity 13.7, how do we think the displacement of rod AB will be affected if(i) current is rod AB is increased,(ii) a stronger horse shoe magnet is used, and(iii) length of the rod AB is increased?Answer: (i) O increasing the current in rod AB its displacement will increase. We don't care about the real polarity of the particles. What will you do if you see a person coming in contact with a live wire? (iv) Connect the copper wire vertically between points X and Y as shown in diagram in series with battery, plug and a key. Question. What is the role of the split ring in an electric motor?Answer: In electric motor, the split ring acts as commutator. The divergence, that is, the falling degree of closeness of magnetic field lines indicates the fall in strength of magnetic field near and beyond the ends of the solenoid. Keep one bar on the table and move other bar along its lengthfrom one end to the other, if uniform attraction is felt the bar in our hand is a magnet and vice versa. A manufacturer is trying to produce as muchammonia as possible per day. 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. These notes and questions are really useful as they have been developed based on the most scoring topics and expected questions in upcoming examinations for Class 10. The direction of magnetic field can be found by using Amperes right hand thumb rule. (b) Direction of deflection is reversed. State the consequences that can lead to a short circuit. A few text and reference books even outright state this, saying that electricity is composed of electrons. If you have an excess of one reactant there will be molecules passing through the reactor which can't possibly react because there isn't anything for themto react with. (i) Two circular coils P and Q are kept close to each other, of which coil P carries a current. 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. (iii) If the bar magnet is held stationary inside the coil, then no induced current is set and galvanometer does not show any deflection. Nope, wrong. (v) Battery a battery is connected across the carbon brushes. A few text and reference books even outright state this, saying that electricity is composed of electrons. Question. Split Rings and Brushes: Split rings (X and Y) are simply a brass (or copper) ring which is divided into two parts. What is the direction of magnetic field?Answer:An electron beam moving horizontally from back wall towards the front wall is equivalent to a current flowing in the opposite direction. But inside the battery's wet electrolyte, the charge-flow goesin two opposite directions at the same time. What is the principle of an electric motor?Answer: An electric motor is based on the principle that the current carrying conductor experiences a force when placed in a magnetic field. Thus conductor experiences a force when placed in a uniform magnetic field.Factors on which direction of force depends:(i) The direction of force depends upon the direction of magnetic field. Insteadweintentionally define"electric current" as being a flow of exclusively positive particles flowing in one particular direction. Question. Connect the aluminium rod in series with a battery, a key and a rheostat. (iii) The length of the conductor. Question. AC can be transmitted to long distances with lesser power loss. State the direction of magnetic field in the following case: Question. 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. Answer: Answer: We makethe negative particles positive,then add their current to any positive particles which were flowing forward. These three effects cover almost everything we encounter in electronics. Now take a bar magnet and a compass. (i) When coil P is moved towards Q, current will be induced in coil Question This is because on moving P the magnetic field associated with Q increases and so a current is induced. Then we can use thesemeters everywhere. (iii) State one advantage of AC over DC. In which direction in this field forces an particle (+ve charged) be projected to that it is deflected southward? Increasing the number of turns in the coil. The direction of magnetic field is from N pole of the magnet to its S pole. 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. Answer: We might start tosee "Electric Current" itself as a sort of abstract,invisible, difficult-to-imagine thing. A high current through a horizontal power line flows at this place from west to east. (ii) is affected when the direction of flow of current is reversed?Answer:(i) The strength of magnetic field is directly proportional to the strength of current. 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. Mark the north and south poles in the diagram.Answer:The pattern of the magnetic field lines is as shown in figure. Question 6. Its principle is when a rectangular coils is placed in a magnetic field and current is passed through it, a force acts on the coil, due to which the coil rotates. 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. But due to inertia the coil Magnet continues to rotate along the same direction. On what effect of an electric current does an electromagnet work? (i) How is the direction of magnetic field at a point determined? (i) = 90, = ? Besides giving the explanation of (iii) = 60, F = ? How should these be changed to decrease magnetic field at a point?Answer:(a) The direction of deflection of a magnetic compass needle depends upon the direction of the magnetic field at that point. 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.) more closer the magnetic field lines more the strength of magnetic field. And these three effectsdon't careabout the amounts of positive and negative particles, or about their speed, their mass, their charge, etc. Two negatives make a positive.) The nitrogen and hydrogen remain as gases even underthese high pressures, and can be recycle A brief summary of the Haber ProcessThe Haber Process combines nitrogen from the air with hydrogen derived mainly from natural gas (methane) into ammonia. 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. (ii) Brushes: Brushes help in transfer of current between coil and external circuit. 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.) Now move the compass on the drawing board. Yet it's not real, it's simply one way to simplify things. Increasing the strength of the magnetic field used. The flowing negativesand positives are usually not equal,and the speed of the positives in one direction is usually not the same as the speed of the negatives in the other. (ii) What is the direction of magnetic field at the centre of a current-carrying circular loop? when a battery is being charged then direction of current reverses. We might lose track of the facts that electric current is an actual flow of matter. These circles represents magnetic field lines around the conductor.d. (b) An electric oven of rating 2 kW, 220 V is operated in a domestic circuit with a current rating of 5 A. 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? (i) Draw the magnetic field lines produced around it. length of the conductorb. 3,34,300 While trying to understand electric circuits and electrical measurements, we need a simpleway to take measurements of this important entity named"Electric Current." Question. coil so a current is induced in the coil so galvanometer gives a deflection.b. The flowing negativesand positives are usually not equal,and the speed of the positives in one direction is usually not the same as the speed of the negatives in the other. How can the magnitude of the induced current in a coil be increased? in English & in Hindi are available as part of our courses for Class 10. The phenoemenon is electromagnetic induction. Nobody talks about the "Conventional Charge!" Extra Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Solutions. Nope, wrong. These various conductors are nothing exotic. The phenomenon is electromagnetic induction. Class 10 Magnetic Effects Of Electric Current Extra Questions Question 7. 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. 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. (iii) If direction of magnetic field is reversed, the direction of force is also reversed. (ii) Slip rings- Slip Rings one two rings made up of brass which rotates along with the coil. Question. (a) An electric current is passed in a horizontal copper wire from east to west. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. are not electrical. Answer: 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? 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? Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator -type electric machines of the dynamo type. Since this electric generator producing alternating current, it is also called A.C. generator. Then we can use thesemeters everywhere. Calculate the force acting on the charge. Question. The linkgives 16,000 google hits. Why is electromagnetic induction so called? In an AC generator, the ends of the coil are connected to two full rings of copper called slip rings. Does the direction of the force remain unchanged on two sides of the coil resulting in continuous rotation of the coil in same direction. Question. What is electric generator? such that its length is greater than its diameter is called solenoid. (iii) If length of the rod is increased, force acting on it will increase and hence, displacement of the rod increases. State two ways by which the strength of an electromagnet can be increased.Answer:By increasing the strength of current and number of turns of the solenoid we can increase the strength of an electromagnet. (b) Which part of an electric appliance is earthed and why?Answer: (a) The standard colour code forLive wire RedNeutral BlackEarth Green respectively. Choose analogous statement for water: A. Insteadweintentionally define"electric current" as being a flow of exclusively positive particles flowing in one particular direction. Explain one precaution that should be taken to avoid the overloading of domestic electric circuit.Answer:Connecting large number of electric appliances in one socket whose load is more than the maximum permitted limit. Question. He reports that Of course in metal wires outside thebattery, the real particle flow is only from negative to positive. (vi) Keep the variable resistance in fixed position. Question. (b) (i) If the current is increased, the magnetic field strength also increases. 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. So, during the time when the charges flow between the two plates of the battery, what's therealdirection? 1. When the coil rotates the shaft attached to it also rotates. According to Flemings left hand rule stretch the thumb, forefinger and central finger of your left hand such that they are mutually perpendicular. from west to east a particles must be projected. By melting itself, a fuse break the circuit. We ignore their speed, and instead measure only the flow rate: the number of charges flowing per second. 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. 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. (a) The given figure shows a domestic electric circuit.Study this circuit carefully. The magnetic field lines outside a bar magnet: (a) Originate from the South pole and end at its North Pole. Ourown nervous system is based on the two-way currents. (c) Electric fuses and earth wire. Strength of magnetic field is doubled when the current through the loop is doubled B I .b. In what respect it is different from generator? Question 3. If we did this, then"conventional current" would bemuch easier to accept, no? Draw a labelled circuit diagram of a simple electric motor and explain its working. Direction of force acting on a current carrying conductor kept in a magnetic field is given by : (A) Fleming's right hand rule (B) Fleming's left hand rule (C) Lenz's rule (D) Faraday's rule Solution 10. These various conductors are nothing exotic. (vi) Tap the cardboard gently a few times. If current in a conductor flows in the upward direction, then the direction of magnetic field around the conductor is in anticlockwise direction. Question. Sprinkle the iron filings uniformly on the cardboard. Magnetism, heating, and voltage drop together represent nearly every feature that's important in everyday electrical circuitry. Region A has stronger magnetic field. Place a magnetic compass near one end of the magnetc (N-pole) and mark the positions of the two ends (N and S-poles) of the compass needle using a sharp pencil. 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? Question. The pointer remains at zero (the centre of the scale) for zero current flowing through it. (b) Principle of working of electric motor: A currentcarrying coil placed in a magnetic field experience a torque. There is a simple answer, but firstBatteries are another example of non-electron or "ionic" conductors. Question 3. Then we can use thesemeters everywhere. If the current flows from south to north, the needle moves in opposite direction (towards west). Not right to left, not left to right, but inboth directions atonce. In this particular instance, it will increase their chances of hitting and sticking to the surface of the catalyst where they can react. What does the direction of thumb indicate in the right hand thumb rule? No google hits! State one main difference between A.C. and D.C. Why is A.C. preferred over D.C. for long range transmission of electric power? During your painful experience there obviously was a considerable current directed through your body. Question. 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. If they do so then at the point of intersection, two tangents can be drawn at that point which indicates that there will be two different directions of the same magnetic which field, i.e. 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. 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. Do we follow the negative particles and ignore the positive ones? = 60, F = ? In the everyday world of electronics, these particles arethe electrons and protonssupplied by atoms in conductors.Physicists may additionally deal with other charged particles: muons, positrons, antiprotons,etc. (iii) In pulling the magnet out of the coil, a deflection in opposite direction is observed. There is a simple answer, but firstBatteries are another example of non-electron or "ionic" conductors. (c) Name a device that uses the above principle.Answer:a. Thus a couple acts on the coil which rotates the coil in the same direction (anti-clockwise). We might lose track of the facts that electric current is an actual flow of matter. 0 times. (b) A fuse is connected in series or in parallel in household circuit? Question. According to Flemings right hand rule, which part of right hand indicate the movement of conductor?Answer: Thumb. source: Battery A.C. source: A.C. generator. When current passes through the coil, it flows in arms CB and AD in a direction perpendicular to the magnetic field. Yes, this is true but only true for metals. 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. F = Bqv sin There is apowerful flow of electric charge going through the battery, yet no individual electrons flow through the battery at all. Answer: Teachers promote the(wrong?) (a) Which effect of the electric current is utilised in the working of an electrical fuse? If there is a change in current in a coil then current will be induced in the another neighbouring coil.No current is induced because there is no change in magnetic field. (c) Draw a schematic labelled diagram of a domestic circuit which has a provision of a main fuse, meter, one light bulb and a switch socket.Answer:a. (a) More the radius weakere the field. By convention, we define the flowing charges to be positive. Direct current always flows in one direction but the alternating current reverses its direction periodically. Identify the region where field is strongest and why? theory, EduRev gives you an 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. Nobody talks about the "Conventional Charge!" https://ncertmcq.com/extra-questions-for-class-10-science/, Extra Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Solutions. (ii) What happens to the deflection of needle when current in the conductor is increased? This tends to rotate the coil in anticlockwise direction. In the everyday world of electronics, these particles arethe electrons and protonssupplied by atoms in conductors.Physicists may additionally deal with other charged particles: muons, positrons, antiprotons,etc. Which property of a proton will change while it moves freely in a magnetic field?Answer: Momentum or Velocity. Name and state the rule you have used to find the direction in this case.Answer:Forefinger direction of magnetic field (upwards).Thumb direction of force (southwards) Middle finger gives direction of current or direction of positively charged particle (East) i.e. 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. Write oneimportant advantage of using alternating current. During the electric current, the positive atoms flowed in one direction, while the negative atoms simultaneously flowed in the other. What is an electromagnet? The fuse is rated for a certain maximum current and blows off when a current more than the rated value flows through it. That increases your capital costs when the plant is built.High pressures cost a lot to produce and maintain. (b) Explain what is short circuiting and overloading in an electric supply.Answer:(a) When metal body of an electric appliance is connected to a wire which is connected to a metal plate buried deep inside the earth is said to be electrically earthed. That increases your capital costs when the plant is built.High pressures cost a lot to produce and maintain. Explain.Answer: Power rating of electric oven (P) = 2 kW = 2000 WCurrent drawn (I) = P/V = 2000/220 = 9.09 A.As the current rating of domestic electric circuit is only 5A the oven draws a current of 9.09 A. the radius of the loop is reduced to half of the original radius?Answer:The pattern of lines of force due to a magnetic field through and around a current carrying loop of wire is shown below, a. During an electric current, both varieties of particles are flowing past each other in opposite directions.TWO-WAY POS/NEG ELECTRIC CURRENTS CAN EXIST IN:*.batteries*.human bodies*.all living organisms*.acids (mostly protons flow)*.the ground*.the ocean*.the sky (ionosphere)*.electrolytic capacitors*.aluminum smelters*.liquid mercury and solder*.ion-based smoke detectors*.electroplatingtanks*.fuel cells' proton conductor and "solid acid" membranes*.electrophoresis gels in research (esp. (b) Two coils P and S are wound over the same iron core. (v) Sprinkle some iron flings unformly on the cardboard. (ii) When key is closed, there is deflection in galvanometer. A Charge 3.2 10-19C moving with velocity 106 m/sec enters in a magnetic field of intensity 3 meber/m2 at are angle of 60. What is the function of an earth wire? Answer:(a) These magnetic field lines are produced by a current carrying loop. The electric charges in a human body are entirely composed of positive and negative chargedatoms or "ions." Track your progress, build streaks, highlight & save important lessons and more! Not right to left, not left to right, but inboth directions atonce. State one advantage of ac over dc.Answer:a. 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. Question. Question of Class 10-Electric Current : The magnitude of electric current in a conductor is the amount of electric charge passing through a given point of the conductor in one second. But inside the battery's wet electrolyte, the charge-flow goesin two opposite directions at the same time. AC can be transmitted by changing it at high voltage with the help of transformer to minimise loss in transmission. (c) By inserting a soft iron rod into the middle part of solenoid it is used to make an electromagnet(d) (i) By increasing the number of turns. (c) vertically downwards. Name an instrument in which the directive property of a magnet is used. Question 1. Now reverse the direction of current the rod is deflected in opposite direction. In India, the AC changes direction after every 1/100 second, that is, the frequency of AC is 50 Hz. Explain the underlying principle and working of an electric generator (or dynamo) by drawing a labelled diagram. Battery electrolyte is veryconductive. Magnetic Effects Of Electric Current Class 10 Extra Questions Question 4. it is towards the flow of positive charge and negative to the flow of negative charge( electrons). Why is it necessary to earth metallic appliances?Answer:The earth wires functions as a safety measure, especially for those appliances that have a metallic body, like heater, electric, press, room cooler etc. Two coils C1 and C2 are wrapped around a nonconducting cylinder. This extreme heat may cause fire in the building. The electric charges in a human body are entirely composed of positive and negative chargedatoms or "ions." Do we follow the negative particles and ignore the positive ones? area of cross section of the coilc. Answer:(i) It is because current carrying conductor produces a magnetic field which superimposes with magnetic field of compass needle due to which needle of compass gets deflected. What does it mean? We ignore their speed, and instead measure only the flow rate: the number of charges flowing per second. the strength of the current passing through this loop is double?b. Question. (b) How is the direction of magnetic field at a point determined? (ii) Larger deflection in opposite direction as compared to the case (i) will be seen. (i) When north pole is pushed into the coil, a momentary deflection is observed in the galvanometer. And it's only true for solidmetals. What is meant by solenoid? (a) reversing the direction of floe of floe of current (b) doubling the magnitude of current.Answer: The direction of earths magnetic field is from U-south to 0-north. Let the current pass through the loop clockwise. (b) When direction of current is perpendicular to the direction of magnetic field, the force experienced will be maximum. Question 3. 1. recycled. Nobody talks about the "Conventional Charge!" The alternating current (A.C.) reverses its direction periodically whereas the direct current (D.C.) always flows in one direction.A.C. Class 10 Magnetic Effect Of Electric Current Extra Questions Question 3. (a) Electric fuse is an important component of all domestic circuits. Hence, we get current flowing in the direction ABCD. Principle- When a rectangular coil carrying current is placed in a magnetic field, it experiences a force that rotates it. Magnetic field is the space around a magnet or a current carrying conductor in which its magnetic force can be experienced.b. The postive atoms behave like flowing protons, but protons with entire atoms attached. = 3 3.2 10-19 106 sin 60 Magnetism, heating, and voltage drop together represent nearly every feature that's important in everyday electrical circuitry. Imagine the flows as being like crowdsof of tiny moving dots, with half the dots going in one direction andhalf in the other. In what respect does the construction of an AC generator differ from that of a DC generator? Solenoid: A coil of many circular turns of insulated copper wire wrapped closely in the shape of a cylinder is called a solenoid. Justify your answer. (iii) Connect the ends of coil in series with a battery, and key. 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. There is a simple answer, but firstBatteries are another example of non-electron or "ionic" conductors. The two brushes B1 and B2, which are connected to a galvanometer G, are in contact with the rings S1 and S2 respectively. . In nearly every situation they willtell us all we could ever want to know about flows of charged particles in any circuit. What is the magnetic force experienced by the beam?Answer:Zero, it is because beam is moving parallel to the magnetic field. If a fuse is replaced by one with larger ratings, the appliances may get damaged while the protecting fuse does not burn off. Teachers promote the(wrong?) Now the deflection is towards north, so the force is towards north. Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 4 Effects of Electric Current. Answer: (i) When key K is closed due to increasing current a magnetic field is produced which is changing.In this changing magnetic field coils is kept so an induced current flow through it, so galvanometer shows a deflection. Question. Battery electrolyte is veryconductive. What is the direction of the magnetic field?Answer:The direction is vertically downwards. 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. What does the direction of thumb indicate in the right-hand thumb rule? Yet something is missing! In which direction in this field should an a-particle (which are positively charged particles) be projected so that it is deflected south ward? How is the direction of a magnetic field at a point determined? In this particular instance, it will increase their chances of hitting and sticking to the surface of the catalyst where they can react. 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.) What happens if a current carrying conductor is placed in the magnetic field? Ourown nervous system is based on the two-way currents. Question. It is shown by the deflection in galvanometer. The direction of force on a current carrying conductor in a magnetic field is given by (a) Fleming's left hand rule. Chapter 13 Science Class 10 Extra Questions Question 8. What result do you expect? These threetypes of meter will agree that a"current" is a"current" regardless of the particle polaritiesand flows. But the"electricity" in common electrical devices is limited to positive protons andnegative electrons. the pole of another magnet when placed in the magnetic field experiences a greater force where the field lines are crowded. Question. If the direction of magnetic field and that of current are mutually perpendicular thenforce acting on the conductor will be perpendicular to both and will be the given by Flemings left-hand rule. 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? The first observation is wrong. 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 Have you? (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 will point. When is the force experienced by a current carrying conductor placed in a magnetic field greatest?Answer:When the current in the conductor flows perpendicular (90) to the direction of the magnetic field, maximum force is generated. Question. Yes, but weonlyneed this information if we want to knoweverythingabout the electriccurrent. 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. Class 10 Science Ch 13 Extra Questions Question 1. Keep a bar magnet in the centre of the paper and sprinkle some iron filings uniformly around the bar magnet. Then the fingers will wrap around the conductor in the direction of the magnetic field . Answer: With the help of a diagram of experimental setup describe an activity to show that the force acting on a current carrying conductor placed in a magnetic field increases with increase in field strength.Answer:Aim : To show that force acting on a current carrying conductor placed in a magnetic field increases with the field strength.Apparatus Required : Aluminium rod, stand horse shoe magnet of different intensity, cell, key and connecting wires.Procedure :1. As a result, the resultant magnetic field is very strongand uniform.Solenoid behaves like a strong bar magnet. 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