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

Magnetic poles are always in _____________

pairs (north and south)

100
the study of the interaction between electricity and magnetism
What is electromagnetism
100

Electrons move to one part of an object because it is in the electric field of another object.

Induction

100

Transfer of electrons from one object to another by rubbing.

Friction

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 are the two poles in a magnet?

North and South

300

The area around a magnet where the magnetic force is exerted.

What is a magnetic field

300

Tiny groups of charged atoms inside iron. Also is another name for atoms.

What are domains

300

materials that do NOT allow electricity to flow through easily

Insulator

300
This machine uses electromagnetic induction to change mechanical energy into electrical energy.
What is an electric generator
300

Electrons transfer from object with contact.

Conduction

400

What makes something magnetic?

The atoms (or 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

a push or pull exerted by a magnet

Magnetic Force

400

Temporary magnets made from a wire carrying a current around a metal core.

Electromagnets

500

True/False: The magnetic field is strongest close to the poles.

True

500

True/False: The needle of a compass always points South

FALSE. The needle will always point North

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

material that allows electricity to flow through it easily

Conductors

500

What happens when you have two south poles?

They will repel

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