The electric main in a house are marked 220 V, 50Hz. Write down the equation for instantneous voltage?

Write down Maxwell's equation for steady electric field.

A bulb of resistance of 10 ohm, connected to an inductor of inductance L, is in series with an a.c. source marked 100 V-50 Hz. If the phase angle between the voltage and current is pi//4 radian, calculate the value of L.

A household supply of a.c. in India has a peak value of 311 V and a frequency of 50 Hz. Write the equation to represent the same.

An electric lamp is connected to 220 V - 50 Hz supply. The peak voltage in the circuit is

A capacitor, resistor of 5 ohm and an inductor of 50 mH are in series with an a.c. source marked 100V-50hz. It is found that voltage is in phase with the current. Calculate the capacitance of the capacitor and the impedance of the circuit.

An electric bulb rated 22V is connected to 220 V-5Hz source. Then, the bulb

An electric motor takes 5 A form a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

Two lamps, one rated 100 W at 220 V and other 60 W at 220 V, are connected in parallel to electric main supply. What current is drawn from the line if the supply voltage is 220 V?