Magnets Flashcards
1
Q
What are the 4 magnetic materials?
A
Nickel
Cobalt
Iron
Steel
2
Q
The direction of the field is important. Where does it always point?
A
Away from the north
Towards the south
3
Q
What are the rules of magnetism?
A
Opposite poles attract
Like poles repel
4
Q
How is an electromagnet made?
A
Wrap an insulated wire around an iron nail in coils: Makes a solenoid
Connect leads to each end.
Plug them into a power supply.
Turn on current.
To increase voltage you can increase the current or add more coils.
To test see how many paper clips are picked up.