ElectroMagnetism

What is/are the difference(s) between a magnet and an electromagnet? (two correct choices)

• An electromagnet can be turned on/off.

• A magnet can be turned off.

• An electromagnet is stronger.

What is/are the difference(s) between a magnet and an electromagnet?

• An electromagnet can be turned on/off.

• A magnet can be turned off.

• An electromagnet is stronger.

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How do you increase the strength of an electromagnet?

• Add a motor and/or light bulbs

• Add more light bulbs and wire coils

• Add more wire coils

• Increase the voltage

you can inccrease the strength of an electromaget by

• Decreasing the current

• Decreasing the loops

• using a stronger iron (Ferro) material

• winding the coils more loosely

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A compass works because of the effect that the moon has on the earth's magnetic field.

• True

• False

You can increase the strength of an electromagnet by:

• Decreasing the battery charge

• Decreasing the amount of loops in the solenoid

• Winding the coils more closely

• Winding the coils more loosely

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What is the difference between a galvanometer and an electric motor?

• Electric motor does not require electric current

• Galvanometer uses electric energy

• In an electric motor, the wire spins

• an electric motor uses electric energy

Magnetic poles that are UNLIKE will:

• attract

• repel

• do nothing

• all of these.

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A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.
• B. motor.   
• C. magnet.
• D. transformer.

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NGSS.MS-PS2-5

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

• attraction zone

• work area

• magnetic field

• hot zone

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