Find the capacitance of a capacitor, which when put in series with a resistance of 10 ohm makes the power factor equal to 0.5 . Assme an 80 volt-100 Hz a.c. supply.

A coil of inductance of 4//pi henry is joined in series with a resistance of 30 ohm. Calculate the current flowing in the circuit, when connected to a.c. mains of 200 volt and frequency 50 Hz.

Calculate the value of an inductance, which should be connected in series with a capacitance of 5muF resistance of 10 ohm and a.c. source of 50 Hz. So that the power factor of the circuit is unity.

A capacitor of 10 microfarad is connected in series with a resistance of 2.2 xx 10^5 ohm. Determine the time constant for the circuit. Can we think of oscillations in this circuit, such that the frequency is equal to the inverse of the time constant? Justify your answer with proper explanation.

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.

A choke of 0.5 henry, a capacitor of 15muF and resistance of 100 ohm are connected in series across 200 volt, 50 hertz main. Find current in the ciruit.

A choke of 0.5 henry, a capacitor of 15muF and resistance of 100 ohm are connected in series across 200 volt, 50 hertz main. Find power factor of the circuit.

A capacitor of capacitance 100mu and a coil of resistance 50 ohm and inductance 0.5 Henry are connected in series with 110 volt and 50 Hz source. Calculate the impedance of the circuit.

A 1 mH inductance and 10muF capacitance, when connected in series to an a.c. source, possess equal reactance. The angular freqency of the a.c. source