Question

If a current I gives by I₀ sin 108/216 flows in an ac circuit across which on ac potential of E = E₀ sin wt has been applied, then the power consumption P is the circuit will be :-
1. P = 125/216
2. P = 127/216 E₀ I₀
3. \(\begin{array}{*{20}{c}} {\Box}\\ {{D_1}} \end{array}\)
4. P = 0

Answer 1

Correct Answer - Option 4 : P = 0

I = I₀ sin(ωt − π/2)

E = E₀ sin ωt.

Current is lagging by π/2 with emf so the. Power consumption P in the circuit = 0

Therefore, the correct Answer is (D)