Inductance Multiple Choice Questions and Answers
16. The property of coil by which a counter emf is induced in it when the current through the coil changes is known as
A. Self inductance
B. Mutual inductance
C. Series aiding inductance
D. Capacitance
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A. Self inductance
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17. Which of the following circuit element stores energy in the electromagnetic field ?
A. Inductance
B. Condenser
C. Variable resistor
D. Resistance
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18. Both the number of turns and the core length of an inductive coil are double. Its self inductance will be
A. Unaffected
B. Doubled
C. Halved
D. Quadrupled
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19. An open coil has
A. Zero resistance and inductance
B. Infinite resistance and zero inductance
C. Infinite resistance and normal inductance
D. Zero resistance and high inductance
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20. The direction of induced e.m.f. can be found by
A. Laplace's law
B. Lenz's law
C. Fleming's right hand rule
D. Kirchhoff's voltage law
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