Magnetism Flashcards
1
Q
What are some characteristics of magnets?
A
- They are usually made of iron. 2. They attract some materials. 3. They can also repel other magnets. 4. They have two ends called magnetic poles.
2
Q
What are some types of magnet?
A
- Bar magnet. 2. Wand magnet. 3. Doughnut magnet. 4. Horseshoe magnet.
3
Q
In a magnet, same poles _____.
A
‘repel’.
4
Q
In a magnet, opposite poles _______.
A
‘attract’.
5
Q
Name four metals that are magnetic.
A
- Iron. 2. Nickel. 3. Cobalt. 4. Steel.
6
Q
What is a magnetic field?
A
The area surrounding a magnet that can exert a force on magnetic materials.
7
Q
What is a magnetic domain?
A
A microscopic magnet region composed of a group of atoms whose magnetic fields are aligned in a common direction.
8
Q
What is an electromagnet?
A
A magnet made by wrapping a coil of wire around an iron bar and passing an electric current through the coil.
9
Q
Electromagnets can be _______ __ and ___
A
‘turned on’ and ‘off’.
10
Q
We can make an electromagnet stronger by…
A
- Wrapping the coil around an iron core. 2. Adding more turns to the coil. 3. Increasing the current flowing through the coil.
