Question

Take a hollow cylindrical pipe of iron and wind a large number of turns of well insulated copper wire on it. Clean the two ends of the wire and attach a torch bulb/LED to it. Now, take a strong bar magnet and move it rapidly towards the centre of the pipe (without touching it). We find that the bulb glows. However, it glows only for a while and stop glowing as soon as the magnet is stopped. If we now withdraw the magnet away from the coil, we find that the bulb again glows up’ momentarily. We are, thus, getting electricity through this motion of the magnet near/through a coil.