Electromagnetism, Motors, and Generators

Which of the following represents how generators convert energy?

• chemical energy -----------> solar energy

• mechanical energy ------------> chemical energy

• mechanical energy -----------> electrical energy

• electrical energy ------------> mechanical energy

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-5

Which of the following lists would make an electromagnet?

• Battery, pencil, and wire

• Battery, nail, and string

• Battery, stick, and string

• Battery, iron rod, and wire

Tags

NGSS.MS-PS2-3

In an electrical generator, the energy transformation begins as ___________ and becomes ____________.

• mechanical; electrical

• electrical; mechanical

• electrical; chemical

• mechanical; chemical

Tags

NGSS.HS-PS3-3

What do you think would happen to an electromagnet if you disconnected the battery?

• Nothing would happen to the electromagnet.

• The electromagnets magnetic field would get stronger.

• The electromagnets magnetic field would get weaker.

• The electromagnets magnetic field would "go away."

Which of the following are true for motors? Select all that apply.

• Motors transform electrical energy into mechanical energy.

• Motors contain an electromagnet that spins between a permanent magnet.

• Motors transform chemical energy into electrical energy.

• A motor spins due to the attraction and repulsion of magnets.

Tags

NGSS.MS-PS3-5

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

• The strength of the electromagnet decreases.

• The strength of the electromagnet increases.

• The strength of the electromagnet does not change.

• The strength of the electromagnet stops completely.

Tags

NGSS.MS-PS2-3

Which of the following statements is true about electricity?

• Electricity is the flow of negatively charged particles called electrons.

• Electricity is the flow of negatively charged particles called protons.

• Electricity is the flow of negatively charged particles called neutrons.

• Electricity is the flow of neutrally charged particles called neutrons.

In a(n) ____________, a spinning turbine moves magnets which generates an electric current.

• electromagnet

• permanent magnet

• motor

• generator

Tags

NGSS.HS-PS2-5

This picture shows a turbine generator used to produce electricity at a geothermal power plant.
Electricity is produced by using steam to _____________.

• heat the turbine generators
• spin the turbine generators 
• reduce friction in the turbine generators
• reduce emissions from the turbine generators

Tags

NGSS.MS-PS3-5

NGSS.MS-PS2-1

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.MS-PS2-3