Explain electromotive force.

Four identical cells each having an electromotive force (e.m.f.) of 12 V , are connected in parallel. The resultant electromotive force (e.m.f.) of the combination is

What is electromotive force of a cell?

Dimensional formula for electromotive force is same as that for

A circular coil expands radially in a region of magnetic field and no electromotive force is produced in the coil. This can be because

The phase difference between the current and the electromotive force in an ac circuit is pi//4 radian. If the frequency is 50 Hz, then the time difference corresponding to this phase difference, will be –

As shown in the figure, a magnetic is moved with a a fast speed towards a coil at rest. Due to this, induced electromotive force, induced charge in the coil are E , I and Q respectively. If the speed of magnetic is doubled, the incorrect statement is