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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A. Inductance

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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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B. Doubled

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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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B. Infinite resistance and zero 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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B. Lenz's law

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