Explain Faraday’s law of induction with the help of activity.
Answers
1. Connect the terminals of a coil to a sensitive galvanometer as shown in figure.
2. Normally, we would not expect any defection of needle in the galvanometer
because there is no EMF in the circuit.
3. Now, if we push a bar magnet towards the coil, with its north pole facing the coil,
the needle in the galvanometer deflects, showing that a current has been setup in
the coil; the galvanometer doesn’t deflect if the magnet is at rest.
4. If the magnet is moved away from the coil, the needle in the galvanometer
again deflects, but in opposite direction, which means that a current is set up in coil in
opposite direction.
5. If we use the end of South Pole of magnet instead of North Pole, the results i.e., the
deflection in galvanometer are exactly opposite to previous one.
6. Form this, we conclude that change in magnetic than liked with closed coil,
produces current.
