When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed.What will be the result?

Pulling the north pole out reverses the change in magnetic flux compared with moving it in, so the induced current flows in the opposite direction. Because the magnet is pulled out faster, the flux changes more quickly, producing a larger induced current. The result is a larger current in the opposite direction.

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