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

A lamp consumers only 50% of maximum power applied in an A.C. Circuit. What will be the phase difference between applied voltage and circuit current?

An electric bulb consumes only 25% of the peak power in an a.c. circuit. What is the phase difference between the circuit and the applied a.c. voltage ?

In a LCR series circuit, if the phase difference between applied voltage and current is zero then

The phase difference between voltage and current in series L-C circuit is

The phase difference between voltage and current in an LCR series circuit is

The power factor of an, ac circuit is 0.5 Phase , difference between voltage , and current in this circuit is

An L-C-R circuit is connected to a source of A.C. current. At resonance, the phase difference between the applied voltage and the current in the circuit, is