An inductance of `2H` carries a current of `2A`. To prevent sparking when the circuit is broken a capacitor of `4muF` is connected across the inductance. The voltage rating of the capacitor is of the order of

A circuit having a self inductance of 1 henry carries a current of 1 A. To prevent the sparking when the circuit is broken, a capacitor which can withstand 500 V is connected across the switch. What is the minimum value of the capacitance of the capacitor?

A circuit has a self inductance of 1H and carries a current of 2A. To prevent sparking when the circuit is switched off, a capacitor which can withstand 400V is used. The least capacitance of the capacitor connected across the switch must be equal to

A circuit has a self inductance of 1H and carries a current of 2A. To prevent sparking when the circuit is switched off, a capacitor which can withstand 400V is used. The least capacitance of the capacitor connected across the switch must be equal to

The circuit shown has been connected for a long time. The voltage across the capacitor is

Two capacitors of capacities 1muF and 4muF are connected in series with battery of 200V. The voltage across them are in the ratio of

4 capacitors, each of 2muF , are connected as shown. What will be the equivalent capacitor across the points A, B?

Calculate the effective voltage of battery connected across the given circuit, if voltage across the capacitor of capacitance 2C is V volts.

A 10muF capacitor is connected across a 200V , 50Hz A.C. supply. The peak current through the circuit is

A variable capacitor and an inductive coil with negligible resistance are connected in series to an A.C. voltage of value 100V . The current in the circuit is 5A . When the capacitor decreases to half its value, the current becomes 10A . The voltage across the capacitor, in first case, is