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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
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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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