Question

What is different about the voltage when you bring the coil near one pole of the magnet as opposed to the other pole?

Answer 1

The voltage produced when bringing a coil near one pole of a magnet depends on the relative motion between the coil and the magnet. If the north pole is brought near the coil, a positive voltage is produced, while bringing the south pole near the coil produces a negative voltage.

Step-by-step explanation:

When bringing a coil near one pole of a magnet, the voltage produced depends on the relative motion between the coil and the magnet. If the north pole of the magnet is brought near the coil, a positive voltage is produced as the magnet enters the coil. This is because the magnetic field lines of the magnet induce a change in the magnetic field within the coil, which generates an electromotive force (emf) or voltage. If the experiment is repeated with the south pole of the magnet brought near the coil, the direction of the current flow will change, resulting in a negative voltage being produced. Thus, the difference in voltage when bringing the coil near one pole or the other is the sign of the voltage.

Answer 2

Step-by-step explanation:

This experiment is knows as Faraday's law of induction and as per this a coil is attached to a galvanometer and a magnet is moved near the coil.

As one pole of the magnet is pushed near the coil, the voltage increases and needle in galvanometer deflects. Same phenomena occurs while doing it from different pole , the needle get deflected in different direction.

This shows that the change in magnetic flux induce a electromotive force.

This force is same in quantity for both the poles but of opposite direction.