An incandescent lamp of resistance `80 Omega` draws a current of `0.75 A`. Find the line voltage.

In a step up transformer, the turn ratio is 1:10. A resistance of 200 Omega connected across the secondary draws a current of 0.5 A. What is the primary voltage?

An incandescent lamp draws a current of 0.5 ampere. How many electrons are passing through the filament of lamp every hour ?

Assuming that the silicon diode having resistance of 20 Omega , the current through the diode is (knee voltage 0.7 V)

A Cell sends a current of 0.5 A through a 2 Omega resistance. If the resistance is increased by 5 Omega , the current falls to 0.25 A. Find the emf of the cell and its internal resistance.

A lamp draws a current of 2.0 A. Find the charge in coulombs used by the lamp.

A car has a fresh storage battery of e.m.f 12 V and internal resistance 2 xx 10 ^(-2) Omega . If the starter motor draws a current of 80 A. Then the terminal voltage when the starter is on is .