If the input voltage Vi to the circuit below is given by Vi(t) = A cos(2πft), the output voltage is given by Vo(t) = B cos(2πft + ϕ)
Which one of the following four graphs best depict the variation of ϕ vs f ?
Correct option (C)
Explanation:
Resultant of VC, VR & B give Vi and angle between Vi & B is ϕ. When f is very high XC → O then VC → O
Resultant of VC, VR & B lie between B and VR.
B lag behindϕ
At higher frequency ϕ become – ve.
