In an amplitude modulator, the tank circuit consists of a coil of inductance 7.2 mH and capacitor 50 pF. If an audio signal of frequencies 10 kHz modulates the carrier generated by the tank circuit, find the frequencies of the side bands.

In a diode detector, output circuit consists of a resistor of 10MOmega and a capacitor of 1pF.Calculate the carrier frequency it can detect.

A capacitor with capacitance C and a coil with active resistance R and inductance L are connected in series to a source of sinusoidal voltage of frequency omega . Find the phase difference between the current fed to the circuit and the source voltage.

A capacitor of capacitance 100mu and a coil of resistance 50Omega and inductance 0:5 henry are connected in series with a source of voltage 110V and frequency 50 hertz. Calculate the current in the circuit.

A circuit consists of a noninductive resistor of 50 Omega , a coil of inductance 0.3 H and resistance 2 Omega , and a capacitor of 40 mu F in series and is supplied with 200 volt rms at 50 cycles / sec.

A coil has an inductance 0.7 H and is joined in series with a resistance of 220 ohm. Find the wattles component of the current in the circuit, when an alternating e.m.f. of 220 V at a frequency of 50 hz is supplied to it.