The potential differences across the resistance, capacitance and inductance are80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is
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a
0.4
b
0.5
c
0.8
d
1.0
answer is C.
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Detailed Solution
Here, VR=80 V,VC=40 V,VL=100 V Power factor, cosϕ=RZ=VRV=VRVR2+VL-VC2=80(80)2+(100-40)2=80100=0.8