The $r.m.s.$ current in an $AC$ circuit is $2 \ A$. If the wattless current is $\sqrt{3} \ A$,what is the power factor?

$A$ series $LCR$ circuit is connected to an $AC$ source of voltage $V = 150 \sin(80 \pi t) \text{ V}$. If the resistance of the resistor in the circuit is $25 \ \Omega$ and the impedance in the circuit is $75 \ \Omega$, the average power dissipated per cycle in the circuit is: (in $\text{ W}$)

If the power factor in a circuit is unity,then the impedance of the circuit is

Define average power (true power) in an $AC$ circuit.

In the circuit shown in the figure,if the value of $rms$ current is $2.2\, A$,the power factor of the box is:

The power factor of a good choke coil is