GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What happens to the energy in a system of magnets when the magnetic force causes the magnets to move?
A
The potential energy in the system increases.
B
The kinetic energy in the system decreases.
C
Some kinetic energy changes into potential energy.
D
Some potential energy changes into kinetic energy.
Explanation: 

Detailed explanation-1: -The potential energy does not change because the magnets in the system do not change. The potential energy increases because Magnet 1 moves against the magnetic force.

Detailed explanation-2: -When two magnets have attractive forces between them and they are moved apart, kinetic energy is transferred into the magnets when they are released and they move back together. Changing the distance between two magnets changes the amount of energy that can be transferred into and out of a magnetic field.

Detailed explanation-3: -The magnets will move away from each other because the magnet force will push them apart. What happens to the potential energy in the system, when the magnetic train is moved away from the stationary magnet? The potential energy increases because the magnet is moved against the magnet force.

Detailed explanation-4: -Magnetic potential energy is energy stored in a system of magnets as a result of the exertion of a magnetic force on each other. When two magnets attract or repel each other potential energy can be stored in their relative positions.

Detailed explanation-5: -And because magnets have north and south poles, the potential energy depends not only on the position within a field but also the magnets’ orientation. Again, you could increase the potential energy by moving the magnets opposite the direction of the magnetic force.

There is 1 question to complete.