Practicing Success
An AC source of emf $V(t) = V_0 sinωt$ is put across a pure capacitor. The value of angular frequency of instantaneous power is: |
0 $\omega $ $2\omega $ $\frac{\omega }{2}$ |
$2\omega $ |
The correct answer is option (3) : $2\omega $ $V(t)=V_0sin \omega t$ In a capacitor $I(t)=I_0sin \left(\omega t +\frac{\pi}{2}\right)$ $=I_0cot \omega t $ $P_{in\, f}=V(t) I(t)$ $=V_0sin \omega t I_0 cos \omega t$ $=\frac{V_0I_0}{3}sin 2 \omega t$ Angular frequency $=2 \omega $ |