Calculate the back `e.m.f` of a `10H`, `200 Omega` coil `100 ms` after a `100V` d.c supply is connected to it.

Calculate the back e.m.f of a 10H, 200 Omega coil 100 ms after a 100Vdc supply is connected to it.

The resistance of the armature of a dc motor is 50 Omega . A power supply of 200 V is connected across it and the current through the armature is 2A. What is back emf ?

A 100W heather coil is rated 200V. Find the resistance of the coil.

A 100 W, 200 V bulb is connected to a 160 V supply. The power consumption would be

Two resistane coils of 100 ohm and 200 ohm respectively are connected in series across 100 V. A moing coil voltmeter of 200 ohm is connected across 200ohm coil. What will it read?