Question

What will you observe when -

a) the magnet is moved into the coil rapidly?

b) the magnet is held stationary inside the coil?​

Answer 1

Ans1:- When a magnet is moved towards the coil quickly, rate of change of flux is larger that that if the magnetic is movedslowly, thus larger emf is induced due to quick movement of the coil.

Ans2:- When the magnet is held stationaryin the coil, there will be a magnetic flux in the coil but it will remain constant. Since the magnetic flux does not change, there is no induced current in the coil and the galvanometer shows no deflection.

Answer 2

Answer:

You should notice two things: If the magnet is held stationary near, or even inside, the coil, no current will flow through the coil. If the magnet is moved, the galvanometer needle will deflect, showing that current is flowing through the coil.