The reciprocal of the total effective resistance of an $LCR$ $a.c.$ circuit is called:

Write the $SI$ unit of capacitive reactance.

Inductive reactance of a coil is expressed in

What is capacitive reactance? Write its unit.

The phase difference between current and voltage in an $AC$ circuit is $\pi/4$ radian. If the frequency of $AC$ is $50\, Hz$,then the phase difference is equivalent to the time difference:

The unit of reactance is