Electromagnetic Induction – Page 3 – HI MCQ!

The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as?

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Two 800?H coils in series without mutual coupling have a total inductance of?

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ln an iron cored coil the iron core is removed so that the coil becomes an air cored coil The inductance of the coil will?

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Higher the self-inductance of a coil?

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For a 30 mH inductance (L1) and a 60 mH inductance (L2) The combined inductance of L1 and L2 in series aiding with 30 mH mutual inductance will be?

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For a 30 mH inductance (L1) and a 60 mH inductance (L2) The value of coupling factor is?

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Which circuit element(s) will oppose the change in circuit current?

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An average voltage of 10 V is induced in a 260 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is?

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Lenz’s law is a consequence of the law of conservation of?

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A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

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