Question

1. in a computer simulation, ayesha moves a magnet (magnet 2) away from another magnet (magnet 1) that can move. which statement accurately describes the change in potential energy?

a the potential energy does not change because the magnets in the system do not change.
b the potential energy decreases because magnet 2 moves against the magnetic force.
c the potential energy decreases because magnet 2 moves in the same direction as the magnetic force.
d the potential energy increases because magnet 2 moves against the magnetic force.

Explanation:

When a magnet (Magnet 2) moves against the magnetic force (for example, if the magnets are repelling each other and we move one away against the repelling force), work is done against the magnetic field. According to the work - energy principle, when work is done against a conservative force (magnetic force is conservative in this context), the potential energy of the system increases.

• Option a: Potential energy changes with the position of the magnets in the magnetic field, so this is wrong.
• Option b: Moving against the magnetic force should increase potential energy, not decrease.
• Option c: If it moved in the direction of the magnetic force, potential energy would decrease. But the problem states it moves away (against if there is a repelling force), so this is wrong.
• Option d: When moving against the magnetic force (assuming a situation like repelling magnets where moving apart against the repulsion), the potential energy of the magnetic system increases.

Answer:

d. The potential energy increases because Magnet 2 moves against the magnetic force.