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Q.

Current in a coil of self-inductance 2.0 H is increasing as i = 2 sin t2. The amount of energy spent during the period when the current changes from 0 to 2 A is

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a

1 J

b

2 J

c

3 J

d

4 J

answer is D.

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Detailed Solution

W=∫0tLidi=4L∫0tSin2t2dt=4 J

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