Table of Contents
Table of Contents
- Relative Motion of Coil and Magnet
- Factors affecting the Strength of the Induced Current
- Summary
- What’s Next?
In the previous segment, we learnt about electromagnetic induction. In this segment, let us understand more about electromagnetic induction due to the relative motion of a coil and a magnet.
What will happen when a coil is moved towards or away from the magnet?
- Consider a galvanometer connected to a coil. Move this coil towards a bar magnet and then away from it. It is noticed that the galvanometer deflects.
- That is, by moving a coil towards and away from a magnet, a current is induced in the coil.
- When the coil is moved towards or away from the coil, the magnetic lines of force passing through the coil changes. Hence, a current is induced in the coil.
- Thus, due to relative motion, current will be induced in a coil if a coil is moved by keeping the magnet stationary or the magnet is moved by keeping the coil stationary.
What are the factors on which the strength of the induced current depends?
- The strength of the induced current is directly proportional to the speed of relative motion between the coil and the magnet.
- The strength of the induced current is directly proportional to the strength of the magnet.
- The strength of the induced current is directly proportional to the number of turns of the coil.
Summary
