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.......$^o$

What is capacitive reactance? Write its unit.

Write the $SI$ unit of capacitive reactance.

Define inductive reactance and capacitive reactance for an $L-C-R$ series $AC$ circuit. Write their formulas and $SI$ units.

Inductive reactance of a coil is expressed in

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 $\Omega$)