Ps2.1

What is the transfer of electricity in a motor?

• chemical to mechanical 

• electrical to mechanical

• mechanical to electrical 

• physical to potential 

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

Why did this simple electric motor work?

• The current from the battery induces a magnetic field in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet

• The electromagnet on top of the battery pulls on the magnetic copper wire

• The magnet induces a current in the copper loop which makes it rotate.

• The magnetic field from the battery induces an electric current in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet

Tags

NGSS.MS-PS2-3

What is required for sound to be produced and heard?

• A vacuum

• A source of sound, a medium to travel through, and a receiver

• A magnetic field

• A light source

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NGSS.MS-PS4-2

When you hear a loud sound, what kind of energy transfer is primarily happening?

• From light to sound energy

• From mechanical to sound energy

• From sound to mechanical energy

• From thermal to sound energy

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

• Wind

• Water

• Magnets

• Circuits

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NGSS.MS-PS3-5

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.

Tags

NGSS.MS-PS2-3

Surrounding every magnet is a __________  __________.

• magnetic field

• electrical current

• another magnet

• an enemy

How does the electromagnet in the diagram above demonstrate the relationship between magnetism and electricity?

• The wire is wrapped around the iron core, but no electric circuit is present.

• The wire is wrapped around the iron core, but no energy source is present.

• The wire in the electric circuit is wrapped around an iron core producing a magnetic field.

• No circuit is present.

Tags

NGSS.MS-PS2-3

Which of the following is flowing through the electromagnet above?

• electric current

• magnetic current

• magnetic energy

• chemical energy

Tags

NGSS.MS-PS2-3