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 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?

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

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

In the circuit shown, the capacitor is initially uncharged. The switch S is closed at t = 0. Time after which voltage across capacitor and resistor are equal is:

A certain oscillating circuit consits of a capacitor with capacitance C , a coil with inductance L and active resistance R , and a switch . When the swith was disconnected, the capacitor was charged, then the switch was closed and oscillations set in. Find the ratio of the voltage across the capacitor to its peak value at the moment immediatel after closing the switch.

Condsider . In the circuit shown is the switch can be shifted to positions 1 and 2 The charge on capacitor C_(1) when the switch is at position 1 is.

Condsider . In the circuit shown is the switch can be shifted to positions 1 and 2 The charge on capacitor C_(1) when the switch is at position 1 is.

Two capacitors of capacitance 2muF and 5muF are charged to a potential difference 100V and 50 V respectively and connected such that the positive plate of one capacitor is connected to the negative plate of the other capacitor after the switch is closed, the initial current in the circuit is 50 mA. the total resistance of the connecting wires is (in Ohm):

Two capacitors of capacitance 2muF and 5muF are charged to a potential difference 100V and 50 V respectively and connected such that the positive plate of one capacitor is connected to the negative plate of the other capacitor after the switch is closed, the initial current in the circuit is 50 mA. the total resistance of the connecting wires is (in Ohm):