Eletromagnets Flashcards
1
Q
What is an electromagnet
A
An electromagnet is a magnet made out of an iron core and piece of wire rapped around it
2
Q
How can we increase the strength of an electromagnet
A
- Increasing the number of coils
- Increasing the current
- Adding an iron core
- Increasing the length of the wire
3
Q
What is a solenoid
A
A piece of coiled wire
4
Q
What is a permanent magnet
A
A magnet that can’t be turned on or off
5
Q
What is a non permanent magnet
A
A magnet that can be turned on or off
6
Q
What makes a permanent magnet permanent
A
Because all of it’s domains are alined
7
Q
How can you misalign domains
A
By hitting it hard enough or by heating it
8
Q
What the symbol for a bulb
A
A circle with a cross in it
9
Q
What the symbol for a cell
A
One thin tall line and one thick short line
10
Q
What is the symbol for resistance
A
Ohms
Symbol=omega
