In a series LR circuit with XL = R. power factor is P1.

In a series LR circuit with X_L = R. power factor is P₁. If a capacitor of capacitance C with X_C = XL is added to the circuit the power factor becomes P₂. The ratio of P₁ to P₂ will be

(1) 1: 3

(2) 1: √2

(3) 1:1

(4) 1: 2

In a series LR circuit with XL = R. power factor is P1.

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