Motors and Generators

Generators are devices that convert _____ energy into _____ energy.

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

Tags

NGSS.HS-PS3-3

In a _______ a spinning turbine moves magnets which generates an electric current.

• Motor

• Generator

Tags

NGSS.HS-PS3-3

What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?  

• Electromagnet 

• Generator

• Electron Magnet 

• Motor

What happens to the strength of an electromagnet as you add more coils around it?

• Increases
• Decreases
• Stays the same
• Stops completely

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What can you do to make electromagnets stronger?

• Increase number of coils of wire.

• Increase number of batteries used.

• Both A and B.

• Neither A nor B.

What is produced by moving a permanent magnet through a coil of copper wire?

• electricity

• electromagnet

• light

• sound

Which best describes how a motor works?

• When a fan blows on a wire, it causes it to spin, creating a force.

• When a fan blows on a wire, it causes it to spin, creating an electrical current.

• When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.

• When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.

Tags

NGSS.HS-PS2-5

Which statement best explains the flow of energy through a motor?

• battery-->electrical current-->copper wire rotor -->magnet--> mechanical energy

• battery--> magnet--> electrical current--> copper wire rotor--> mechanical energy

• magnet--> mechanical energy--> copper wire rotor--> battery--> electrical current

• magnet--> copper wire rotor--> mechanical energy--> battery--> electrical current

Which part of a circuit allows electrical current to flow between the battery and light bulb?

• load
• power source
• resistor
• conductor

Which of these can apply a force without actually touching an object?

• motor
• generator
• magnetic field
• turbine

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5