Question

An alternating voltage V=V₀ω t is applied across a circuit. As a result, a current I=I₀(ω t-π/2) flows in it. The power consumed per cycle is

• A. zero
• B. 0.5V₀I₀
• C. 0.707V₀I₀
• D. 1.414V₀I₀

Hint:

Purely inductive or capacitive circuits consume no average power.

Answer 1

The Correct Option is A

Step 1: Phase difference φ=π/2.
Step 2: Average power: Pₑₓtₐᵥg=VₑₓtᵣmₛIₑₓtᵣmₛφ
Step 3: Since (π/2)=0, power consumed is zero.