In a series $LCR$ circuit,resistance $R = 10 \Omega$ and the impedance $Z = 20 \Omega$. The phase difference between the current and the voltage is.......$^o$

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

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 $Omega$)

What are phasors?

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 $Omega$)