Magents & Electromagnets Flashcards
Which of the following are magnetic poles?
North and south
Name the 3 magnetic materials
Iron, Nickel and Cobalt
What do two poles of the same type do when they are brought close together?
They repel
What do two unlike poles do when they are brought close together?
They attract
The arrow on magnetic field lines shows them flowing in which direction?
From north to south
Where are the field lines most concentrated around a bar magnet?
For a bar magnet, the field lines are most concentrated at both poles. There are fewer in the middle.
How can we increase the strength of an electromagnet?
Add an iron core
What is one difference between electromagnets and bar magnets?
Electromagnets need electricity but bar magnets do not
What can we use to find the shape of a magnetic field?
A compass
