Question

A magnet is moved close to a rubber band. How does the energy stored in the magnetic field change? (1 point)
Responses

The energy stored in the magnetic field does not change.
The energy stored in the magnetic field does not change.

The energy stored in the magnetic first increases and then decreases.
The energy stored in the magnetic first increases and then decreases.

The energy stored in the magnetic field increases.
The energy stored in the magnetic field increases.

The energy stored in the magnetic field decreases.
The energy stored in the magnetic field decreases.

Answer 1

The energy stored in the magnetic field does not change.

Reason: a rubber band is essentially non‑magnetic (its permeability ≈ μ0), so moving the magnet in free space just translates the field without changing its configuration or B^2 distribution in the material. (Any diamagnetic effect is negligible.) Thus the magnetic-field energy remains the same.