Alternating Current

In an \(\mathrm{AC}\) circuit, the current is \(\mathrm{i}=5 \sin \left(100 \mathrm{t}-\frac{\pi}{2}\right) \mathrm{A}\) and voltage is \(\mathrm{e}=200 \sin (100 \mathrm{t})\) volt. Power consumption in the circuit is \(\left(\cos 90^{\circ}=0\right)\)