A variable capacitor is connected to an inductor of inductance 20 mH. For what capacitance will the circuit resonate at a frequency of 1 kHz?

An inductance of 1 mH a condenser of 10 μF and a resistance of 50 Ω are connected in series. The reactances of inductor and condensers are same. The reactance of either of them will be

In a series resonant R-L-C circuit, the voltage across R is 100 V and the value of $= 1000\;{\rm{\Omega }}$ . The capacitance of the capacitor is $2 imes {10^{ - 6}}\;{\rm{F}};$ angular frequency of AC is $200{\rm{\;rad\;}}{{\rm{s}}^{ - 1}}$. Then the potential difference across the inductance coil is

A 12 ohm resistor and a 0.21 henry inductor are connected in series to an ac source operating at 20 volts, 50 cycle/second. The phase angle between the current and the source voltage is

A pure inductor of 25 mH is connected to a source of 220 V. Given the frequency of the source as 50 Hz, the rms current in the circuit is

A coil of inductance L has an inductive reactance of ${X_L}$ in an AC circuit in which the effective current is $I$. The coil is made from a super-conducting material and has no resistance. The rate at which power is dissipated in the coil is

An ac voltage is applied to a resistance R and inductor L in series. If R and the inductive reactance are both equal to 3Ω, the phase difference between the applied voltage and the current in the circuit is

An inductive circuit contains a resistance of 10 ohm and an inductance of 2.0 henry. If an ac voltage of 120 volt and frequency of 60 Hz is applied to this circuit, the current in the circuit would be nearly

The power dissipated in an AC circuit is zero if the circuit is

The power dissipated in an AC circuit is zero if the circuit is

Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the emf of AC is increased, the effect on the value of the current