Ohms Law and Motors Generators and Electromagnets

What two forces are required for generators and electric motors to work?

• magnetism and thermal

• electricity and thermal

• electricity and magnetism

• magnetism and radiant

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is the transfer of energy in a generator?

• Kinetic to Electrical 

• Physical to Potential 

• Electrical to Mechanical

• Yogurt to Light

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NGSS.HS-PS2-5

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NGSS.HS-PS3-3

A device that transforms kinetic energy to electrical energy is a

• generator

• motor

• transformer

• magnet

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NGSS.HS-PS3-3

How are electromagnets different from permanent magnets?

• magnets can be turned on/off

• you can turn an electromagnet on/off

• magnets are more powerful

• magnets have a North and South pole

Tags

NGSS.HS-PS2-5

In large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.

• Wind
• Water
• Magnets
• Circuits

Tags

NGSS.HS-PS2-5

What is the device seen here?

• generator
• electric motor
• electromagnet
• magnet

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NGSS.HS-PS2-5

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A device that converts kinetic energy into electrical energy

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. electricity

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NGSS.HS-PS3-3

What is the relationship between electrical current and magnetic field strength in an electromagnet?

• When current is increased, magnetic field strength increases
• When current is increased the strength of magnetic field decreases
• When the current is decreased, the strenght of the magnetic field is increased.
• There is an "indirect proportion," meaning, if the value of one goes up, the value of the other goes down.

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NGSS.HS-PS2-5

How do you increase the strength of an electromagnet? (choose two)

• Add a motor and/or light bulbs

• Add more light bulbs and wire coils

• Add more wire coils

• Increase the voltage

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NGSS.HS-PS2-5

How can a magnet be used to produce an electric current?

• Hold a magnet next to a piece of wire.

• Wrap wire around a magnet.

• Spin the magnet around inside a coil of wire.

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NGSS.HS-PS2-5