Magnetic Fields Review

Front

What is a magnetic field?

Back

A magnetic field is a region around a magnet where magnetic forces can be detected and where magnetic materials experience a force.

Front

What is potential energy in the context of magnetic fields?

Back

Potential energy in magnetic fields is the energy stored in the magnetic field due to the position of magnets relative to each other.

Front

What happens to potential energy when magnets are brought closer together?

Back

The potential energy decreases as the magnets attract each other.

Front

What happens to potential energy when magnets are moved apart?

Back

The potential energy increases as work is done against the magnetic force.

Front

What is the direction of magnetic field lines?

Back

Magnetic field lines emerge from the north pole of a magnet and enter the south pole.

Front

What does it mean for magnets to repel each other?

Back

When magnets repel, they push away from each other due to like poles facing each other (north-north or south-south).

Front

What does it mean for magnets to attract each other?

Back

When magnets attract, they pull towards each other due to opposite poles facing each other (north-south).

Front

How can you visualize magnetic field lines?

Back

Magnetic field lines can be visualized using iron filings sprinkled around a magnet, which align along the field lines.

Front

What is the relationship between magnetic force and distance?

Back

The magnetic force decreases as the distance between two magnets increases.

Front

What is the formula for calculating potential energy in a magnetic field?

Back

Potential energy (U) in a magnetic field can be calculated using U = -m * B * cos(θ), where m is the magnetic moment, B is the magnetic field strength, and θ is the angle between them.