Network Analysis and Synthesis - ECE Questions and Answers

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

ω C₀V₀ cos ωt

ω C₀V₀ sin ωt

ω C₀V₀ (cos ωt - cos² ωt)

none of the above

Answer : Option C

Explanation :

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

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