Current in an ac circuit is given by `I= 3 sin omega t + 4 cos omega t, ` then

Options

A. rms volue fo current is `5A`
B. mean value of this current in one half period will be `6//pi`
C. if voltage applied is `V = V_(m) sin omega t` then the circuit must be containing resistance and capacitance
D. ir voltage applied is `V = V_(m) sin omega t`, the circuit may contains resistance and inductance

Answer

3

Explanation

`i = 5 ((3)/(5) sin omega t + (4)/(5) cos omega t) = 5 (omega t + delta)`
rms value is `(5)/(sqrt(2))`
Mean value can not be decided.
Here current leads voltages so, it is `RC` circuit