Questions in Alternating Current

Select	Question
	For high frequency, a capacitor offers
	The coil of choke in a circuit
	In a circuit, the current lags behind the voltage by a phase difference of $\pi /2.$ The circuit contains which of the following
	The inductive reactance of an inductor of $\frac{1}{\pi }$ henry at 50 Hz frequency is
	An oscillator circuit consists of an inductance of $0.5 mH$ and a capacitor of $20\mu F$. The resonant frequency of the circuit is nearly
	Reactance of a capacitor of capacitance $C\mu F$ for ac frequency $\frac{{400}}{\pi }$ Hz is $25\Omega $. The value C is
	The power factor of an ac circuit having resistance ($R$) and inductance ($L$) connected in series and an angular velocity $\omega $ is
	A circuit has a resistance of $11\Omega ,$ an inductive reactance of $25\Omega $ and a capacitative resistance of $18\Omega .$ It is connected to an ac source of $260$ V and $50$ Hz. The current through the circuit (in amperes) is
	A $0.7$ henry inductor is connected across a $120V – 60 Hz$ ac source. The current in the inductor will be very nearly
	There is a $5\Omega $ resistance in an ac, circuit. Inductance of 0.1H is connected with it in series. If equation of ac e.m.f. is $5\sin 50t$ then the phase difference between current and e.m.f. is