Question

In an lcr circuit with r=11 ohm the instantaneous value of the current i in the circuit and instantaneous value of applied emf e , are i= 200 ma and e= 110 volt. If phase difference between the current and voltage is π/3, then the instantaneous ac power in the circuit is -

Answer 1

P=Vrms×Irms ×Cos(phi)

phi=π/3