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 is a magnetic field?

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A magnetic field is the region around a magnet where magnetic forces can be observed. It is represented by field lines that show the direction and strength of the magnetic force.

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What are the two poles of a magnet?

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The two poles of a magnet are the north pole and the south pole. Opposite poles attract each other, while like poles repel.

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How does Earth’s magnetic field help us?

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Earth's magnetic field helps us by allowing the use of compasses for navigation and protecting us from solar radiation.

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What happens to a nail when it is magnetized by an electric current?

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When a nail is magnetized by an electric current, it temporarily becomes a magnet and can attract other magnetic materials.

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What is the relationship between electric current and magnetism?

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Electric currents produce magnetic fields, which is the principle behind electromagnets.

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What occurs when two magnets are brought close together with the same poles facing each other?

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When two magnets with the same poles facing each other are brought close together, they will repel 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. It can be turned on and off.

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What is the role of magnetic fields in compasses?

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Magnetic fields in compasses align the needle with the Earth's magnetic field, allowing us to determine direction.

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What happens to the magnetic field when the electric current is turned off?

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When the electric current is turned off, the magnetic field disappears, and the nail will no longer be a magnet.