In an a.c. circuit, the instantaneous values of current and e.m.f. are given by: I = I0 sin \(\left(\omega t+\frac{\pi}{2}\right)\) and E = E0 sin ωt. The power P consumed in the circuit is:
A. \(\frac{\mathrm{E}_{0} \mathrm{I}_{0}}{\sqrt{2}}\)
B. \(\text { EI } \sqrt{2}\)
C. zero
D. \(\frac{E_{0} I_{0}}{2}\)
Answer:C
In an a.c. circuit, the instantaneous values of current and e.m.f. are given by: I = I0 sin \(\left(\omega t+\frac{\pi}{2}\right)\) and E = E0 sin ωt. The power P consumed in the circuit is:
A. \(\frac{\mathrm{E}_{0} \mathrm{I}_{0}}{\sqrt{2}}\) B. \(\text { EI } \sqrt{2}\) C. zero D. \(\frac{E_{0} I_{0}}{2}\)