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Find voltage across 2H inductor.

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Find voltage across 2H inductor.

(a) 2V

(b) 10V

(c) 12V

(d) 20V

This question was addressed to me in an interview for internship.

This question is from Coils Connected in Series topic in chapter Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
The correct answer is (a) 2V

The explanation is: e=Ldi/dt

Leq=2+10+12+20=44H

di/dt=44/44 = 1 A/s.

Voltage across 2H inductor = 2*di/dt = 2*1=2V.

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