A coil of negligible resistance is connected in series with $90 \Omega$ resistor across $120 \mathrm{~V}, 60 \mathrm{~Hz}$ supply. A voltmeter reads $36 \mathrm{~V}$ across resistance. Inductance of the coil is :

In an $ac$ circuit, the potential difference across an inductance and resistance joined in series are respectively $16\, V$ and $20 \,V$. The total potential difference across the circuit is…….$V$

A series $R-C$ circuit is connected to an alternating voltage source. Consider two situations 

$(a)$ When capacitor is air filled.

$(b)$ When capacitor is mica filled.

Current through resistor is $i$ and voltage across capacitor is $V$ then

An inductive circuit contains resistance of $10\,\Omega $ and an inductance of $20\,H$ . If an $ac$ voltage of $120\,V$ and frequency $60\,Hz$ is applied to his circuit, the current would be nearly …………….$Amp$

A resistor of $200 \;\Omega$ and a capacitor of $15.0 \;\mu \,F$ are connected in series to a $220\; V , 50\; Hz$ $ac$ source.

$(a)$ Calculate the current in the circuit;

$(b)$ Calculate the voltage $(rms)$ across the resistor and the capacitor. Is the algebraic sum of these voltages more than the source voltage? If yes, resolve the paradox.