Show:
Magnets and Magnetism 1
Magnets and Magnetism 2
Magnetism from Electricity
Electricity from Magnetism
Potpourri
100
Any material that attracts iron
What is a magnet
100

What happens when you bring two like poles together?

they repel

100
the study of the interaction between electricity and magnetism
What is electromagnetism
100
What did Faraday and Henry discover?
That you a magnetic field can induce or create an electric current.
100
A device that increases or decreases the voltage of alternating current.
What is a transformer
200
What 3 properties do all magnets have?
1) They have a north pole and a south pole 2) They exert a force 3) They are surrounded by a magnetic field
200

In magnetic forces, like poles ______________ and opposite poles ______________

Like poles repel (push apart) and opposite poles attract (stick together)

200
A coil of wire that produces a magnetic field when carrying an electric current.
What is a solenoid
200
The process by which an electric current is made by changing a magnetic field
What is electromagnetic induction
200
What causes an aurora or "northern lights"?
An aurora is formed when charged particles from the sun hit oxygen and nitrogen in the air.
300
The region around a magnet where the magnetic force can act
What is a magnetic field
300

Tiny groups of charged atoms inside iron.

What are domains

300
A coil of wire wrapped around an iron core
What is an electromagnet
300
This machine uses electromagnetic induction to change mechanical energy into electrical energy.
What is an electric generator
300
What do scientists think causes the Earth's magnetic field?
The movement of electric charges in the Earth's core.
400
What makes something magnetic?
The domains in the object must be aligned or lined up.
400

What happens when you cut a magnet into 2 pieces? Why?

Each piece will have a north pole and south pole because the domains inside the magnet re-align.

400
What is an electric motor?
A device that changes electrical energy into mechanical energy.
400

Faraday's experiment demonstrated that the ___________ current was made only when the _______________ field was changing.

What is electric current and magnetic field

400

A  device that changes electrical energy into mechanical energy. 

electric motor
500

A material that can be turned into a magnet, such as iron, nickel, or cobalt.

ferromagnets 

500
Why does a compass needle point north?
Because the magnetic pole closest to the geographic north pole is the magnetic south pole.
500
What 2 ways can you increase the power of an electromagnet?
By increasing the number of loops of wire around the solenoid and increasing the current.
500

A device that measures the strength and direction of an electric current in a wire.

galvanometer

500

What materials are typically used to make magnets?

Many magnets are made of iron, nickel, cobalt, or mixtures of these metals.