Physics FSC Part 2 Chapter 15 Online MCQ's Test With Answers

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Physics FSC Part 2 Chapter 15 Online MCQ's Test

Sr. # Questions Answers Choice
1 Which of the following quantities remain constant in step up transformer? Current Voltage Power Heat
2 In a coil current change from 2 to 4 A in .05 s . If the average induced emf is 8 V then coefficient of self-inductance is: 0.2 henry 0.1 henry 0.8 henry 0.04 henry
3 The induced emf in a coil is proportional to: Magnetic flux through the coil Rate of change of Magnetic flux through the coil Area of the coil Product of magnetic flux flux and area of the coil
4 What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10-2 Wb, and change in current is 0.01 A? 2 H 3 H 1/2 H Zero
5 The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be: Antoclockwise Clockwise First Clockwise and then Antoclockwise First anticlockwise and then Clockwise
6 The device in which induced emf is statically induced emf is: Transforms AC generator Alevator Dynamo
7 For inducing emf in a coil the basic requirement is that: Flux should link the coil Change in flux should link the coil Coil should form a closed loop Both (b) and (c) are true
8 The magnitude of back emf: Increases with sped of motor Decreases with speed of motor Remains same  None of above
9 Commutator was invented by: William bills William Gates William tells William Sturgeon
10 DC generator by william Sturgeon in: 1894 1961 1834 1961
11 A current generator device converts: Mechanical energy into chemical energy Chemical energy into electrical energy Mechanical energy into electrical energy Both b and c
12 Energy density of an inductor is: UM=1/2μ<sub>∘</sub>/B<sup>2</sup> Um = 2μ<sub>∘</sub>/B UM = 1/2B<sup>2</sup>/μ<sub>∘</sub> Um = 2B<sup>2</sup>/μ<sub>∘</sub>
13 Energy stored in an inductor is: 1/2L<sup>2</sup>I 1/2L<sup>2</sup>/I <sub>1/2LI</sub><sup>2</sup> 1/2LI
14 In self induction A coil is connected in__________ with battery and a rheostat. Parallel Series Both A and B None of above
15 The Si unit of Mutual inductance is: VA<sup>-1</sup>S<sup>-1</sup> VAS<sup>-1</sup> VSA<sup>-1</sup> ASV<sup>-1</sup>
16 If force in the direction of velocity of conductor,  then induced current is directed, Anti clockwise Clock wise At equilibrium None of above
17 Electromagnetic induction is exactly according to law of: Momentum Charge Energy Mass
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