Questions in Alternating Current

Select	Question
	The phase angle between e.m.f. and current in LCR series ac circuit is
	A choke coil is preferred to a rheostat in ac circuit as
	An alternating e.m.f. is applied to purely capacitive circuit. The phase relation between e.m.f. and current flowing in the circuit is
	An ac source is connected to a resistive circuits. Which of the following is true
	The average power dissipated in a pure inductor of inductance $L$ when an ac current is passing through it, is (Inductance of the coil L and current I)
	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
	A resonant ac circuit contains a capacitor of capacitance ${10^{ - 6}}F$ and an inductor of ${10^{ - 4}}H.$ The frequency of electrical oscillations will be
	Power delivered by the source of the circuit becomes maximum, when
	An alternating voltage is connected in series with a resistance $R$ and an inductance $L$ If the potential drop across the resistance is $200 V$ and across the inductance is $150 V$, then the applied voltage is
	An inductive circuit contains resistance of $10 \Omega$ and an inductance of $20 H$. If an ac voltage of $120 V$ and frequency $60 Hz$ is applied to this circuit, the current would be nearly