Choke coil works on the principle of

The induction coil works on the principle of

The induction coil works on the principle of

The induction coil works on the principle of

A choke coil has.

A choke coil has.

A choke coil has.

The current in the choke coil decreasing at the rate of 3 A//s and choke coil has inductance 3 H. Then induced e.m.f. across coil is

An electric device, which runs at 80 volt d.c. and consumes 10 A current , is connected to 100 vol-50 Hz a.c. supply through a choke. Calculate the inducance of the choke coil for the safe working of the device.