Magnetism and Electricity

Which of these forces works only by combining electric and magnetic forces?

• Magnetic

• Electric

• Electromagnetism

This force occurs when there is an attractive and repulsive force between two poles.

• Magnetic

• Electric

• Electromagnetism

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In a magnet the opposite poles will ___________.

• attract

• repel

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What makes an electromagnet stronger?

• greater number of loops

• smaller number of loops

• decreasing the current

• decreasing the voltage

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current flowing through a wire is surrounded by a/an

• force field

• magnetic force

• nothing

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when electrons all spin in the same direction, they create an invisible force known as

• electricity

• magnetism

• motor

• electrons

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Magnets have a north and a south ___________

• shape
• color
• pole
• region

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What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.
• Inserting a wooden core inside the coil
• Changing the direction of the current
• Decreasing the number of coils of wire

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NGSS.MS-PS2-3

The strongest part of a magnet is...

• the bars.
• the force field.
• the poles. 
• the middle.

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NGSS.MS-PS2-3

What do you make if you wrap a current-carrying wire around an iron bolt?

• electromagnet
• electric motor
• generator

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