Networks Analysis and Synthesis - Engineering

Q1:

A capacitor whose capacitance Ct = C0 (1- cos ωt) is fed by a sinusoidal voltage v = V0 sin ωt. The equation for current i is

A ω C0V0 cos ωt

B ω C0V0 sin ωt

C ω C0V0 (cos ωt - cos2 ωt)

D none of the above

ANS:C - ω C0V0 (cos ωt - cos2 ωt)

i = or i = C0 (1 - cos ωt) ωV0 cos ωt = C0ωV0 (cos ωt - cos2 ωt)