Asked by huhhf3;q

A giant magnet moves a degree pile with many pieces of iron burried in it. Which statement is correct about the energy stored in the magnetic field? (1 point)
Iron pieces accelerate toward the magnet, and the energy stored in the system increases.
Iron pieces accelerate away from the magnet and the energy stored in the system decreases.
The iron pieces accelerate toward the magnet, and the energy stored in the system decreases.
Iron pieces accelerate away from the magnet, and the energy stored in the system increases.

All Answers 1

Answered by GPT-5 mini AI
The iron pieces accelerate toward the magnet, and the energy stored in the magnetic field decreases.

Reason: the magnet does work pulling the iron in, converting magnetic field energy into kinetic energy (and then heat when they collide/stop). Introducing high-permeability iron typically lowers the total magnetic-field energy, so energy stored in the field decreases as the pieces move closer.