Magnetism

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What is magnetism?

Back

Magnetism is a force that is invisible, but its effects can be made visible, such as with iron shavings.

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What is a permanent magnet?

Back

A permanent magnet is a type of magnet that maintains its magnetic properties without the need for an external power source.

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What materials can a magnet attract?

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Magnets can attract materials that contain iron, nickel, or cobalt, such as nails.

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How can you increase the strength of an electromagnet?

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You can increase the strength of an electromagnet by increasing the number of wire coils, increasing the size of the iron core, or increasing the power of the battery.

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Why do scientists believe the Earth is magnetic?

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Scientists believe the Earth is magnetic because its core is made of nickel and iron.

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What is an electromagnet?

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An electromagnet is a type of magnet that is created by electric current flowing through a wire.

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What is a temporary magnet?

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A temporary magnet is a magnet that only retains its magnetic properties while in the presence of a magnetic field.

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

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A permanent magnet retains its magnetism indefinitely, while a temporary magnet loses its magnetism when the external magnetic field is removed.

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What happens to a magnet when it is heated?

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When a magnet is heated, it can lose its magnetic properties due to the increased thermal energy disrupting the alignment of magnetic domains.

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What is magnetic field?

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A magnetic field is the region around a magnet where magnetic forces can be detected.

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