ou move a bar magnet two inches through a coil of wire. What do you observe in a galvanometer hooked up to the coil?

Question

ou move a bar magnet two inches through a coil of wire. What do you observe in a galvanometer hooked up to the coil?

The pointer swings one way and then swings the other way.
The pointer moves one direction and then goes back to center.
The pointer moves one direction and then stops in that position.
The pointer does not move.

Answer 1

Moving a bar magnet through a coil of wire will induce an electrical current in the wire. This current will create a magnetic field that opposes the motion of the bar magnet. So, when you move the bar magnet through the coil of wire, you will observe a deflection in the galvanometer needle. The needle will swing back and forth for a short time until the induced current fades away. Therefore, the correct answer is: The pointer swings one way and then swings the other way.