The unit of reactance is

The phase difference between current and voltage in an $AC$ circuit is $\pi/4$. If the frequency is $50\, Hz$,what is the time difference?

The resistance of a coil for $DC$ is $5\,\Omega.$ In $AC,$ the resistance

The instantaneous values of current and voltage in an $AC$ circuit are $i = 100 \sin(314t) \ A$ and $e = 200 \sin(314t + \pi/3) \ V$ respectively. If the resistance is $1 \ \Omega$,then the reactance of the circuit will be:

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:

What is the dimension of impedance?