The potential differences across the resistance, capacitance, and inductance are 80 V , 40 V and 100 V ,…

The potential differences across the resistance, capacitance, and inductance are 80 V, 40 V and 100 V, respectively in an LCR circuit. The power factor of this circuit is
  1. 0.4
  2. 0.5
  3. 0.8
  4. 1.0

Solution

Pac=VrmsIrmscosϕ,

where, cosϕ is the power factor.

cosϕ=Rz=VRV=80802+100-402

=80100=0.8.

where, Z is the impedence of the circuit.

Asked in: NEET 2016 (Phase 2)

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