The potential differences across the resistance, capacitance and inductance are 80 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
0.8
b
1.0
c
0.4
d
0.5
answer is A.
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Detailed Solution
tanϕ=VL-VCVR=100-4080=34 or ϕ=37oPower factor = cos ϕ = cos 37° = 45 or 0.8