Why did the galvanometer needle deflect in the experiment?

Question

1. Why did the galvanometer needle deflect in the experiment?

2. Which were the instances in which there was a flow of current through the solenoid?

3. Which were the instances in which the current increased?

Answer 1

1. Whenever there is a change in the magnetic flux linked with a coil, an emf is induced in the coil.

2. Whenever there is a relative motion between the magnet and the solenoid, there is flow of electricity.

3. Number of turns increased. Strong Magnet used Magnet / Solenoid moves with greater speed.