Current in an ac circuit is given by I = 3 sinωt + 4 cosωt, then….

Q: Current in an ac circuit is given by I = 3 sinωt + 4 cosωt, then

(a) rms value of current is 5A.

(b) mean value of this current in any one half period will be 6/π.

(c) if voltage applied is V = Vm sin ωt, then the circuit may be containing resistance and capacitance only.

(d) if voltage applied is V = Vm sin ωt, the circuit may contain resistance and inductance only.

Ans: (c)