Year 8-Electromagnets Flashcards
1
Q
What is different about a magnet to an electromagnet?
A
You can turn the magnetic field on and off
2
Q
Does a wire with an electric current in it have a magnetic field?
A
Yes but it is very small.
3
Q
What do you need to make an electromagnet?
A
A circular coil, a core and an electric current
4
Q
Why is it good to consider the properties of your electromagnet?
A
Because you might need a different core that can lose its magnetism easily or a different wire coil.
5
Q
How can you turn off an electromagnet?
A
By turning off the current
6
Q
How do you make an electromagnet stronger?
A
More loops and coils around the core
Increasing the current
Making the core into a pure iron core
7
Q
What is good about an electromagnet?
A
You can control the power of the electromagnet
