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Q.

In the given circuit the potential difference across resistance is 54 V and power consumed by it is 16 W. If AC frequency is 60 Hz. Find the value of L :

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a

1 H

b

2 H

c

5 H

d

4 H

answer is A.

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Detailed Solution

VR2+VL2=1202 VL=1202-542=107 V ∵VRi=P Now i2πfL=VL ⇒1654 x 2 x π x 60L=107      i=1654A ⇒L=0.96 H≈1 H
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