Magnets
The strongest part of a magnet.
What is the poles?
A loudspeaker is a device that changes electrical energy into this.
What is sound?
This current always flows in one direction.
What is a direct current?
What is an electromagnet?
These power plants split atoms that contain large amounts of energy.
What is nuclear power plants?
Unlike poles do this.
What is repel?
The part of the loudspeaker that vibrates to create sound.
What is the diaphragm?
This current flows in one direction and then flows in the opposite direction.
What is alternating current?
When an electric current is flowing, it creates this around the wire.
What is a magnetic field?
Flowing water can turn these and create electrical energy.
What are turbines?
The tiny particles _______ and _______ in all different directions until they come in contact with a magnet.
What is push and pull?
The mouthpiece of the phone contains this.
What is a microphone?
This changes electrical energy into mechanical energy.
What is an electric motor?
Magnets can generate this.
What is an electric current?
These power plants use the heat inside Earth to produce steam.
What is geothermal power plant?
A mineral that is a natural magnet containing iron.
What is magnetite?
A friend's voice on the phone is changed into this.
This changes motion into electrical energy.
What is an electric generator?
When the electric current is turned off, this is no longer magnetic.
What is an electromagnet?
Name four items in your household that use electromagnets.
What are headphones, telephone, doorbell, vacuum cleaner, and dishwasher?
A magnet that always has magnetic force.
What is a permanent magnet?
A telephone has a tiny this in it.
What is a loudspeaker?
An example of a DC power source
What is a battery?
This guy and Joseph Henry made discoveries about electric current and magnets.
Who is Michael Faraday?
An electric motor has a ________________, a permanent magnet, a rotating loop of wire, and a motor ________.
What is a power source and shaft?