Magnetism and Electromagnetism Review

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What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core of ferromagnetic material.

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What is the primary function of an electric pencil sharpener?

Back

An electric pencil sharpener uses a motor to convert electrical energy into mechanical energy to sharpen pencils.

Front

What happens when you cut a magnet in half?

Back

When you cut a magnet in half, you create two smaller magnets, each with its own north and south pole.

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What is a magnetic field?

Back

A magnetic field is the region around a magnet where magnetic forces can be detected. It is represented by magnetic field lines.

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Front

What do magnetic field lines indicate about the interaction between magnets?

Back

Magnetic field lines show the direction of the magnetic force; they indicate that opposite poles attract and like poles repel.

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What is the role of iron in magnetism?

Back

Iron is a ferromagnetic material that can be magnetized; it is attracted to magnets and can become a magnet itself.

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Front

What is the difference between a north pole and a south pole of a magnet?

Back

The north pole of a magnet is the end that points toward the Earth's magnetic north, while the south pole points toward the Earth's magnetic south.

Front

How do you create a temporary magnet?

Back

A temporary magnet can be created by placing a ferromagnetic material, like iron, in a strong magnetic field.

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What is the principle of electromagnetism?

Back

The principle of electromagnetism states that an electric current produces a magnetic field, and a changing magnetic field can induce an electric current.

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What is magnetic attraction?

Back

Magnetic attraction is the force that pulls together opposite poles of magnets or attracts ferromagnetic materials.

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