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In an R-L-C circuit, v(t) = 20 sin (314 t + 5 p/6) and i(t) = 10 sin (314 t + 2p/3). The p.f of the circuit is



Options:
A .  0.5 lead
B .  0.866 lag
C .  0.866 lead
D .  0.5 lead
Answer: Option B



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