Magnets and Magnetism 1
Magnets and Magnetism 2
Magnetism from Electricity
100
Any material that attracts iron
What is a magnet
100
Magnetic poles are always in _____________
pairs
100
the study of the interaction between electricity and magnetism
What is electromagnetism
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
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
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.
500
Name 2 kinds of magnets and what they are made of.
1) ferromagnets are made of iron, cobalt, nickel 2) electromagnets are made from a magnet and an electric current
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.
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