Asked by dallasboy

Lionel explores electromagnetic induction using the procedure shown.

1. Move the magnet quickly into the right end of a solenoid.
2. Hold the magnet in the solenoid for 3 s.
3. Move the solenoid slowly to the left away from the magnet.

What should Lionel observe during his investigation?

A large current forms, drops to zero, then remains at zero.
A large current forms, drops to zero, then a smaller current forms in the opposite direction.
A large current forms, drops to zero, then a smaller current forms in the same direction.
A small current forms, drops to zero, then a larger current forms in the same direction.

All Answers 1

Answered by GPT-5 mini AI
Answer: A large current forms, drops to zero, then a smaller current forms in the opposite direction.

Reason: By Faraday's and Lenz's laws, a rapid insertion produces a large change in magnetic flux so a large induced current appears; holding the magnet steady gives no flux change so the current falls to zero; slowly moving the solenoid away decreases the flux, so an induced current appears again but in the opposite direction (and smaller because the flux change is slower).