Magnetism

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What is magnetism?

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Magnetism is a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

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What are the two types of magnets?

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The two types of magnets are permanent magnets and temporary magnets.

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What is a permanent magnet?

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

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What is a temporary magnet?

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A temporary magnet is a material that acts like a magnet only when it is in the presence of a magnetic field.

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What are the poles of a magnet?

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Every magnet has two poles: a north pole and a south pole.

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What happens when like poles of magnets are brought together?

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Like poles (north-north or south-south) repel each other.

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What happens when opposite poles of magnets are brought together?

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Opposite poles (north-south) attract each other.

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What is an electromagnet?

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An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

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How can the strength of an electromagnet be increased?

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The strength of an electromagnet can be increased by increasing the current or the number of loops of wire.

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What is the Earth's magnetic field?

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The Earth's magnetic field is the magnetic field that extends from the Earth's interior out into space, having north and south poles.