Motors and Generators Test Review

Which of the following describes both electromagnets and bar magnets?

• Attracts iron

• Core is nickel, cobalt or iron

• Both A and B.

• Neither A nor B.

An electric field is created by particles that

• are moving.

• have a charge.

• are radioactive.

• are electrically neutral.

Tags

NGSS.MS-PS2-3

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.

Tags

NGSS.MS-PS2-3

Which of the lists below describes the energy a TV has when it is turned on?

• sound and heat

• heat and light

• light, heat, and sound

• light and sound

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

• electricity

• electromagnet

• light

• sound

Which of the following is a good conductor of electricity?

• a needle

• a granite rock

• a plastic bag

• an index card

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

NGSS.HS-PS3-5

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

Tags

NGSS.MS-PS3-5

If you replace the paper clip with a plastic spoon, what happens?

• The bulb doesn't light
• The bulb is dimmer
• The wires get hot
• There is no change

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-2

Lightbulbs use electricity to make light. What else do lightbulbs often give off?

• Food energy
• Heat Energy
• Solar Energy
• Wind Energy