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

The unit of reactance is

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

The impedance of a coaxial cable,when its inductance is $0.40 \mu H$ and capacitance is $1 \times 10^{-11} F$,is given by: (in $\Omega$)

The resistance of a coil for $dc$ is $R$ ohms. In $ac$, the effective resistance of the coil:

In an $A.C.$ circuit,the reactance of a coil is $\sqrt{3}$ times its resistance. The phase difference between the voltage across the coil and the current through the coil will be