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Q.

The current through choke coil increases form zero to 6A in 0.3 seconds and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is

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a

5 H

b

2.5 H

c

1.5 H

d

2 H

answer is C.

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Detailed Solution

|e| =Ldidt⇒30=L×(6−0)0.3⇒L=1.5 H
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