Alternating Current

Related Questions

• An alternating current is given by the equation $i = {i_1}\cos \omega \,t + {i_2}\sin \omega \,t$. The r.m.s. current is given by

  ---

• Voltage and current in an ac circuit are given by $V = 5\sin \,\left( {100\pi t - \frac{\pi }{6}} \right)$ and $I = 4\sin \,\left( {100\pi t + \frac{\pi }{6}} \right)$

  ---

• The power factor of LCR circuit at resonance is

  ---

• Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the e.m.f. of ac is increased, the effect on the value of the current will be

  ---

• An alternating current of frequency $f$ is flowing in a circuit containing a resistance $R$ and a choke $L$ in series. The impedance of this circuit is

  ---