Electro Magnetic Induction And Alternating Currents Question 171

Question: A small signal voltage V(t)=V0sinωt is applied across an ideal capacitor C:

Options:

A) Current I (t), lags voltage V (t) by 90 .

B) Over a fall cycle the capacitor C does not consume any energy from the voltage source.

C) Current I (t) is in phase with voltage V (t).

D) Current I (t) leads voltage V (t) by 180 .

Show Answer

Answer:

Correct Answer: B

Solution:

  • As we know, power

    P=Vrms.Irmscosϕ

    as cosϕ=0

    (ϕ=90o)

    Power consumed =0 (in one complete cycle)



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