Q.
The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity ω is
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a
R/ωL
b
R/(R2+ω2L2)1/2
c
ωL/R
d
R/(R2−ω2L2)1/2
answer is B.
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Detailed Solution
cosφ=RZ=R(R2+ωL2)1/2
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