Magnestism Flashcards
Name the two poles
North
South
What do opposites do?
Attract
Name the magnetic materials
Iron, steel, nickel, cobalt
Attract or repel?
North to South
Attract
Attract or Repel?
North to North
Repel
Attract or Repel?
South to South
Repel
Explain a magnetic field
Region around magnet where it has a magnetic force
Explain what a domain is?
Small groups of particles acting like small magnets.
Why must domains be in line?
They would just cancel each other out other wise
How do you magnetise a piece if iron?
Stroke it in a straight line in one direction
How do you demagnetise a magnet?
Hammer it - vibrations send domains off course
Heat up - gives atoms energy to move around
What is an electromagnet?
A magnet with an electric current running through it making it stronger
How is an electromagnet made stronger?
More coils
Increase current
Coil around iron coil
