Electromagnetic Induction - Interview Questions | Exam2Win

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26. Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

A. 5 mH

B. 10 mH

C. 5 H

D. 10 H

Explanation:

27. A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

A. 3500 mH

B. 350 mH

C. 250 mH

D. 150 mH

Explanation:

28. A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is

A. 50 ohms

B. 500 ohms

C. 1000 ohms

D. 5000 ohms

Explanation:

29. Two 300 uH coils in series without mutual coupling have a total inductance of

A. 300 uH

B. 600 uH

C. 150 uH

D. 75 uH

Explanation:

30. An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is

A. 20 Wb

B. 2 Wb

C. 0.2 Wb

D. 0.02 Wb

Explanation:

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