Electromagnetism

What device is shown in the picture?

• Generator

• Motor

• Transformer

• Circuit

What is the transfer of electricity in a motor?

• chemical to mechanical 
• electrical to mechanical
• mechanical to electrical 
• physical to potential 

Tags

NGSS.HS-PS3-3

What do you need to turn an iron nail into an electromagnet?

• Battery and string

• Battery, pencil and wire

• Battery and wire

• Peanut butter, lampshade, hand sanitizer

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

Electromagnetic induction occurs in a coil when there is a change in

• electric field in the coil

• magnetic field in the coil

• voltage in the coil

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.HS-PS3-1

NGSS.HS-PS3-4

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

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

• magnetism and thermal

• electricity and thermal

• electricity and magnetism

• magnetism and radiant

Tags

NGSS.MS-PS2-3

A device that transforms electrical energy to mechanical energy is a

• generator

• motor

• transformer

• magnet

A device that transforms mechanical energy to electrical energy is a

• generator

• motor

• transformer

• magnet