Question

On what factors does the induced electromotive force depend?

Answer 1

An electromotive force is induced by a change in magnetic flux, according to Faraday's law of induction. A voltage is formed when the magnetic flux through a coil is altered. The induced emf is the name given to this voltage. The current can only flow if the magnetic field changes.

Complete answer:
The induced electromotive force depends upon the following factors;

This was the setup to find the induced electromotive force. Here a coil has $N$ number of turns which is connected to a galvanometer. A magnet or the coil is moved which causes a change in the magnetic field in the coil. From this we observed, $N$ , the total number of turns in the coil, is directly proportional to the induced electromotive force.

The induced electromotive force is proportional to $A$ , which is the coil's cross-sectional area.$B$ , the strength of the magnetic field in which the coil is revolving, is directly proportional to the induced electromotive force. The induced electromotive force is proportional to ' $\omega$ ' the coil's angular velocity.

The induced electromotive force changes throughout time and is dependent on the instant '$t$'. When the plane of the coil is parallel to the magnetic field $B$ , the induced electromotive force is greatest, and when the plane of the coil is perpendicular to the magnetic field $B$ , the induced electromotive force is zero.

Note: The coil is unaffected by a steady magnetic field, yet current flows when the field changes. A galvanometer is a device that uses the deflection of a moving coil to measure a small electrical current or a function of the current.