Question
The north pole of a bar magnet is moved close to the north pole of another bar magnet that is suspended by a thread. How does the energy stored in the magnetic field change?(1 point)
Responses
The energy stored in the field increases because there is no friction.
The energy stored in the field increases because there is no friction.
The energy stored in the field decreases because there is no friction.
The energy stored in the field decreases because there is no friction.
The energy stored in the field decreases because the magnet moves in the direction of the field.
The energy stored in the field decreases because the magnet moves in the direction of the field.
The energy stored in the field increases because the magnet moves in the direction of the field.
Responses
The energy stored in the field increases because there is no friction.
The energy stored in the field increases because there is no friction.
The energy stored in the field decreases because there is no friction.
The energy stored in the field decreases because there is no friction.
The energy stored in the field decreases because the magnet moves in the direction of the field.
The energy stored in the field decreases because the magnet moves in the direction of the field.
The energy stored in the field increases because the magnet moves in the direction of the field.
Answers
GPT-4o mini
When the north pole of a bar magnet is moved close to the north pole of another bar magnet, both poles exert a repulsive force on each other.
In this case, the energy stored in the magnetic field actually decreases because the two like poles are being pushed apart. Moving the magnets closer together in this manner requires work to be done against the magnetic repulsion, and this will increase the potential energy associated with their configuration. However, when considering the change in energy in the magnetic field, we find that the configuration becomes less stable as the magnets repel, leading to a decrease in energy stored in the field due to less magnetic potential energy.
So the most accurate response would be:
**The energy stored in the field decreases because the magnet moves in the direction of the field.**
This phrasing captures the essence of magnetic interactions, though it's worth noting there's some subtlety in interpreting "direction of the field" versus "direction of repulsion." Nonetheless, among the given options, this response aligns best with physical principles of magnetism.
In this case, the energy stored in the magnetic field actually decreases because the two like poles are being pushed apart. Moving the magnets closer together in this manner requires work to be done against the magnetic repulsion, and this will increase the potential energy associated with their configuration. However, when considering the change in energy in the magnetic field, we find that the configuration becomes less stable as the magnets repel, leading to a decrease in energy stored in the field due to less magnetic potential energy.
So the most accurate response would be:
**The energy stored in the field decreases because the magnet moves in the direction of the field.**
This phrasing captures the essence of magnetic interactions, though it's worth noting there's some subtlety in interpreting "direction of the field" versus "direction of repulsion." Nonetheless, among the given options, this response aligns best with physical principles of magnetism.