Electromagnetism

What is magnetic force?

• A force exerted by electrically charged particles

• The attractive and repulsive forces between two poles

• A force exerted by magnets that makes an object become electrically charged

• A force exerted by a magnet only when it physically touches an object

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Particles with opposite charges ____________ and particles with same (or like) charges ____________.

• attract, repel

• repel, repel

• attract, attract

• repel, attract

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What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field is doubled.

• The strength of the magnetic field decreases.

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What is responsible for creating a magnetic field around Earth?

• Earth's crust

• Earth's iron core

• Earth's mantle

• Earth's atmosphere

What happens if you cut a magnet in half?

• Nothing

• The magnets repel

• There will be two magnets

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The picture above is an example of what?

• Magnetic field

• Electric field

• Repulsion

• Attraction

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What would happen with the magnets in the picture above?

• They would repel

• Nothing

• They would attract

• They would repel and then attract

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Why are these magnets not touching?

• They are like poles and are repelling

• They are opposite poles and are repelling

• There is an electric field

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This picture best illustrates the construction of a(n)

• magnet

• electromagnet

• series circuit

• parallel circuit

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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