List of top Physics Questions on Alternating current asked in BCECE

What is the r.m.s value of an alternating current which when passed through a resistor produces heat, which is four times that produced by a current of 2A in the same resistor?

An r.m.s voltage of 220 V is applied across a series circuit having a resistance of 100 ohm and an impedance of 22 ohm. the power consumed is:

A coil of resistance R and inductance L is connected to a battery of emf E volt. The final current in the coil is

A capacitor of suitable capacitance can be used in an circuit in place of the choke coil. A capacitor blocks DC and allows AC only.

In an AC circuit, V and i are given by V = 100 sin (100t) volt and i = 100 sin $ \bigg( 100 t + \frac{ \pi}{ 3} \bigg) $ amp .The power dissipated in the circuit is

An LCR series circuit, connected to a source $E$, is at resonance. Then

For a series LCR circuit, the phase difference between current and voltage at the condition of resonance will be :