❓ 12-12 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. It is produced by moving electric charges and is represented by field lines that show the direction and strength of the magnetic force.

Front

What is potential energy in the context of magnets?

Back

Potential energy in magnets refers to the stored energy that a magnet possesses due to its position relative to other magnets. This energy can be converted into kinetic energy when magnets move closer or further apart.

Front

What happens when two magnets with the same charge are aligned?

Back

When two magnets with the same charge are aligned, they will repel each other. This is due to the like poles (north-north or south-south) pushing away from each other.

Front

What is the role of the Earth's outer core in generating its magnetic field?

Back

The movement of the liquid outer core, heated by the solid inner core, generates the Earth's magnetic field through the dynamo effect.

Front

What is kinetic energy in a magnetic system?

Back

Kinetic energy in a magnetic system is the energy that a magnet possesses due to its motion. It is the energy of movement that can occur when magnets are allowed to move freely.

Front

How does misalignment affect the interaction between magnets?

Back

Misalignment of magnets can lead to weaker interactions, as the attractive or repulsive forces are not maximized. Proper alignment is crucial for strong magnetic interactions.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It can be turned on or off by controlling the flow of electricity.

Front

What happens to magnets when the power to an electromagnet is turned off?

Back

When the power to an electromagnet is turned off, it loses its magnetic properties and will not attract or repel other magnets.

Front

What is the difference between potential and kinetic energy in a magnetic system?

Back

Potential energy is stored energy based on the position of magnets, while kinetic energy is the energy of motion that occurs when magnets move.

Front

What is the significance of magnetic field lines?

Back

Magnetic field lines visually represent the strength and direction of a magnetic field. The density of the lines indicates the strength of the magnetic field.