Question

In series LR circuit X_L = 3R. Now a capacitor with X_C = R is added in series. Ratio of new to old power factor is 

(A) 1 

(B) 2 

(C) \(\frac1{\sqrt{2i}}\)

(D) \(\sqrt2\)

Answer 1

Correct option is (D) \(\sqrt2\)

Initially in LR circuit;