Networks Analysis and Synthesis - Engineering

Q1:

A series RC circuit has R = 5 Ω and C = 10 μF. The current in the circuit is 5 sin 20000t. The applied voltage is

A
252 sin (20000t + 45°)

B
252 sin (20000t - 45°)

C
252 sin 20000t

D
252 sin (20000t - 90°)

ANS:B -

252 sin (20000t - 45°)

Z = R2 + XC2 = 50 V = 550 sin(20000 t - 45°) V = 252 sin(20000 t - 45°)