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Question

A series LCR circuit connected across (200 V,60 Hz) source. It consists of a capacitor of capacitive reactance 30 Ω, a non-inductive resistor of 40 Ω and an ideal inductor of inductive reactance 90 Ω as shown in the figure. The value of inductance of the inductor in the circuit is nearly -


​​​​​​​[0.77 Mark]

A
1 H
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B
1.61 H
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C
0.24 H
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D
2.91 H
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Solution

The correct option is C 0.24 H
Inductive reactance,

XL=ωL

90=(2π×60)×L [ω=2πf]

L=902π×60=0.24 H

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