PPSC Physics Chapter 6 Electricity and Magnetism With Answers

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PPSC Physics Chapter 6 Electricity and Magnetism

Sr. # Questions Answers Choice
1 Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P. 0.02 0.25 0.33 0.50
2 An electrical source with internal resistance's' is said to operate a lamp of resistance R what fractions of the total power is delivered to the lamp. R+r/R R-r/R R/R+r r/R-r
3 For which material magnetic susceptibility is negative. Paramagnetic Diamagnetic Ferromagnetic All of these
4 Which law states that an induced current is always in such a direction as to oppose the motion or change causing it. Ampere's law Gauss's law Lenz's law Kirchoff's law
5 The property of an object that causes it to create a magnetic field in opposition to an externally applied magnetic field is. Paramagnetism Diamagnetism Ferromagnetism Demagnetism
6 Which of the following materials has highest magnetic suscaptibility. Uranium aluminium Platinum Sodium
7 Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field. Curie's law Voltmeter Ammeter Wattmeter
8 The vertical component of earth's magnetics field is zero. At magnetic poles At geographical poles At magnetic equator Everywhere
9 A current carrying loop lying-in a magnetic field behaves lime a. Magnetics pole Magnetic material Magnetic dipole Horse shoe magnet
10 Magnetic lines of force due to earth's horizontal magnetic field are. Curved lines Elliptical concentric circles Parallel and straight
11 The ratio of average induced emf to the rate of changing of current in the coil is called. Self induction Mutual induction Self inductance Mutual inductance
12 The phenomenon in which a charging current in one coil induces an emf in another coil is called. Induced current Induced emf Self induction Mutual induction
13 A expression for total work done by the battery to move charge against an induced emf is equal to. W = LI2 W = 1/2 LI W = 1/2 L3I W = 1/2 LI2
14 On which factor the self induction does not depends upon. Number of turns of the coil the core material Weight of the coil Area of the cross section of the coil
15 On which factor mutual induction of two coils does not depends upon. Number of turns of the coils Area of cross section of the coils Closeness of the coils Shape of the coils
16 Faraday's law deals with Induced emf Motional emf Induced current Electric current
17 The SI unit of mutual induction a Vs-1 A-1 V m -1 A-1 Henry Tesla
18 Electric Heater operates on the principle of. electromagnetism Electromagnetic induction Electrolysis Momentum
19 The Lenz's law is also a statement of the law of conservation of. Energy Mass Momentum Torque
20 Which of the following is most suitable for the core of the electromagnetism Air Steel Su Ni allow Soft iron
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