8.3 Lesson Set 1 Review Flashcard

Front

What is a magnetic field?

Back

A magnetic field is an invisible area around a magnet where magnetic forces can be felt. It is created by moving electric charges or by magnets.

Front

How do magnets interact with each other?

Back

Magnets can attract or repel each other depending on their poles. Opposite poles attract, while like poles repel.

Front

What is the role of a compass needle?

Back

A compass needle is a small magnet that aligns itself with the Earth's magnetic field, pointing towards magnetic north.

Front

What happens when a current flows through a wire?

Back

When a current flows through a wire, it creates a magnetic field around the wire.

Front

What is the difference between a permanent magnet and a temporary magnet?

Back

A permanent magnet maintains its magnetic properties over time, while a temporary magnet only exhibits magnetism when in the presence of a magnetic field.

Front

What is electromagnetic induction?

Back

Electromagnetic induction is the process of generating an electric current in a conductor by changing the magnetic field around it.

Front

What materials can be magnetized?

Back

Materials that can be magnetized include iron, nickel, and cobalt, which are ferromagnetic materials.

Front

What is the significance of the north and south poles of a magnet?

Back

The north and south poles of a magnet are the points where the magnetic force is strongest. They determine how magnets interact with each other.

Front

How can you demonstrate that a coil of wire creates a magnetic field?

Back

You can demonstrate this by showing that the coil attracts or repels a nearby magnet when current flows through it.

Front

What is the effect of distance on magnetic force?

Back

The strength of the magnetic force decreases as the distance between the magnet and the object increases.