Questions in Alternating Current

Select	Question
	A 280 ohm electric bulb is connected to 200V electric line. The peak value of current in the bulb will be
	An ac source is rated at 220V, 50 Hz. The time taken for voltage to change from its peak value to zero is
	If the value of potential in an ac, circuit is 10V, then the peak value of potential is
	A lamp consumes only $50%$ of peak power in an a.c. circuit. What is the phase difference between the applied voltage and the circuit current
	If an alternating voltage is represented as $E = 141\sin (628\,t),$ then the rms value of the voltage and the frequency are respectively
	The maximum value of a.c. voltage in a circuit is 707V. Its rms value is
	Choke coil works on the principle of
	A choke coil has
	Choke coil is used to control
	Current in the circuit is wattless, if