Networks Analysis and Synthesis - Engineering

Q1:

In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of

A R and C in parallel

B R and C in series

C R and L in series

D either (a) or (b)

ANS:B - R and C in series

As f increases impedance increases and current decreases in RL circuit.