Understanding Electromagnets (article reading)

What is an example of a simple electromagnet?

• A wire wrapped around a plastic rod

• A wire wrapped around an iron nail

• A wire wrapped around a wooden stick

• A wire wrapped around a glass tube.

What is one use of electromagnets in the scrap metal industry?

• To melt metal

• To pick up heavy scrap metal

• To paint metal

• To cut metal

How do maglev trains use electromagnets?

• To slow down

• To levitate above the tracks

• To generate electricity

• To heat the tracks

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In what field is MRI technology used?

• Agriculture

• Healthcare

• Education

• Construction

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How do TVs use electromagnets?

• To generate the picture

• To change channels

• To increase volume

• To connect to the internet.

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What happens to the magnetized object when the electric current is turned off?

• It becomes a permanent magnet

• It loses its magnetic properties

• It becomes stronger

• It changes color.

What is the force between charged particles called?

• Gravitational force

• Electromagnetic force

• Nuclear force

• Frictional force

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What happens when you increase the current in an electromagnet?

• The magnet becomes weaker

• The magnet becomes stronger

• The magnet disappears

• The magnet changes color.

Which of the following materials is best for the core of an electromagnet? A) Wood B) Iron C) Plastic D) Glass.

• Wood

• Iron

• Plastic

• Glass

What is the function of the coil in an electromagnet?

• To store energy

• To create a magnetic field

• To produce sound

• To generate light

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