Q.

An inductor of inductance L and resistor of resistance R are joined in series and connected by a source of emf V and frequency ω. Power dissipated in the circuit is

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a

R2+ω2L2V

b

V2RR2+ω2L2

c

R2+ω2L2¯

d

R2+ω2L2V2

answer is B.

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Detailed Solution

P = Vi cosϕ = VVZRZ=V2RZ2=V2RR2+ω2L2
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An inductor of inductance L and resistor of resistance R are joined in series and connected by a source of emf V and frequency ω. Power dissipated in the circuit is