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

What is the ratio of inductive reactance to capacitive reactance in an $AC$ circuit?

Write the $SI$ unit of capacitive reactance.

If a resistor of resistance $4 \Omega$,a capacitor of capacitive reactance $6 \Omega$ and an inductor of inductive reactance $9 \Omega$ are connected in series with an ac source,then the impedance of the circuit is (in $\Omega$)