Question

The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when magnet was:

• A. moving towards solenoid
• B. moving into solenoid
• C. at rest inside the solenoid
• D. moving out of the solenoid

Answer 1

Answer: (D)

moving out of the solenoid

The maximum deflection in the galvanometer will be observed in the case when the magnet moves out of the solenoid because in this case, the change in the flux linked with the coil will be the maximum.

Therefore. option $D$ is correct.