Electromagnetism Practice

What type of transformer is used to increase the voltage from power stations.

• Step-down transformer

• Step-up transformer

Voltage can be induced in a wire by

• a. moving the wire near a magnet.
• b. moving a magnet near the wire.
• c. changing the current in a nearby wire.
• d. all of these

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NGSS.HS-PS2-5

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

• Generator
• Motor
• Magnet
• Transformer

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___ Law says that the Induced current is proportional to the change of magnetic flux 

• Lenz'
• Faraday's
• Ampere's

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If you wrap more coils around an electromagnet, it will become...

• brighter
• stronger
• weaker
• invisible

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Passing a current through a solenoid will produce

• a magnetic field
• an electric field
• a current field
• nothing is produced

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NGSS.HS-PS3-5

13.7 Based on this picture, which side will have a higher voltage?

• Secondary
• Primary
• Both sides have the same voltage
• Cannot be determined

A __________ is an electrical device that converts AC electricity from one voltage level to another

• transformer

• primary coil

• secondary coil

• center tap

A generator is a device that converts...

• mechanical energy into electrical energy.

• electrical energy into kinetic energy.

• mechanical energy into kinetic energy.

• electrical energy into mechanical energy.

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