Using Magnets
Magnets:
- attract (pull)
- repel (push away)
- do this without touching
a) magnetic field extends outwards
Permanent Magnets:
- keep their magnetism
- Made from:
a) iron
b) other naturally occurring magnetic materials
- Different Permanent Magnets
a) compasses, nevigate
b) computer hard drives, data recorded
c) on credit cards, hold information
d) loud speakers and microphone
e) in food manufacture
- Use Magnets:
a) hold or pick up things
- rely on the fact:
a) Materials magnetised, retains the magnetism
Magnetic Force
Magnets:
- exert force
- area around the magnet: magnetic field
- Magnetic Field:
a) cannot be seen
b) strongest at the poles:
i. strongest magnetic force acts
- size depends on strength
- Compass works and Direction:
a) north pole magnet = north pole earth
b) south pole magnet = south pole earth
- 2 ends or Poles:
a) North seeking (N)
b) South Seeking (S)
c) further away, weaker the force
Magnets:
- attract (pull)
- repel (push away)
- do this without touching
a) magnetic field extends outwards
Permanent Magnets:
- keep their magnetism
- Made from:
a) iron
b) other naturally occurring magnetic materials
- Different Permanent Magnets
a) compasses, nevigate
b) computer hard drives, data recorded
c) on credit cards, hold information
d) loud speakers and microphone
e) in food manufacture
- Use Magnets:
a) hold or pick up things
- rely on the fact:
a) Materials magnetised, retains the magnetism
Magnetic Force
Magnets:
- exert force
- area around the magnet: magnetic field
- Magnetic Field:
a) cannot be seen
b) strongest at the poles:
i. strongest magnetic force acts
- size depends on strength
- Compass works and Direction:
a) north pole magnet = north pole earth
b) south pole magnet = south pole earth
- 2 ends or Poles:
a) North seeking (N)
b) South Seeking (S)
c) further away, weaker the force