Electromagnetism Review

Choose all of the generators

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NGSS.MS-ETS1-1

Choose all of the motors.

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NGSS.HS-ETS1-2

NGSS.HS-PS3-3

Choose all of the transformers.

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NGSS.HS-PS2-5

NGSS.HS-PS3-1

NGSS.HS-PS3-2

How does a motor work?

• Current generates an electric field around the loop of wire. The electric force causes the loop of wire to rotate.

• Current generates a magnetic field in the loop of wire that is then attracted and repelled by the magnet(s) in the motor.

• The magnets in the motor attract and repel the metal in the copper wire that makes up the loop. This causes the loop to rotate.

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

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NGSS.HS-PS3-3

This picture is an example of a ___________

• Step- Up Transformer
• Step- Down Transformer
• Motor
• Generator

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NGSS.HS-PS2-5

NGSS.HS-PS3-3

Motors are devices that convert _____ energy into _____ energy.

• chemical; mechanical

• mechanical; electrical

• electrical; mechanical

• potential; kinetic

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NGSS.HS-PS3-3

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

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NGSS.HS-PS2-5

NGSS.HS-PS3-3

How can you increase the magnetic field strength in an electromagnet?

• Increase the number of coils.

• increase the voltage

• increase the current by reducing the resistance of the coil

• all of the above

Tags

NGSS.MS-PS2-3

How can you decrease the magnetic field strength in an electromagnet?

• Increase the number of coils.

• increase the voltage

• decrease the current by increasing the resistance of the coil

• all of the above

Tags

NGSS.MS-PS2-3