Electromagnetism

A magnet can move in a coil of wire to produce electricity in which system?

• Generator

• Motor

• Magnet

• Transformer

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What type of device is shown?

• Electromagnet

• Electric motor

• Electric generator

• Electromagnetic induction

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Remove all the coils and the nail.

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What kind of magnet can be turned on and off?

• refridgerator magnet

• electromagnet

• magnetite

• iron

What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.

• Electricity always creates a magnetic field.

• Electricity is stronger than a magnetic field.

• Electricity prevents magnetic fields from occurring.

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As the strength of a magnetic field increases, the ability to attract metal objects ____________.

• increases

• decreases

• stays the same

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What conclusion can you draw from this graph?

• As current increases, magnetic strength decreases.

• As current increases, magnetic strength increases.

• As current decreases, magnetic strength increases.

• There is no relationship between current and magnetic strength.

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In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric

• electric, wire, iron

• iron, electric, wire

While electric current is flowing through a wire, what surrounds the wire?

• a magnetic field

• a glowing light

• neutrons

• protons

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NGSS.MS-PS2-3

The area around a magnet is called the .....

• attraction zone

• work area

• magnetic field

• hot zone

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