Electromagnets Flashcards
1
Q
Why is a bar magnet a permanent magnet?
A
Because it is always magnetic
2
Q
What does a wire with electricity flowing through it, kind of field have around it?
A
A magnetic filed
3
Q
What is an electromagnetic?
A
A coil of wire with an electric current flowing through it.
4
Q
When is an electromagnet only magnetic?
A
Its only magnetic while the current is flowing
5
Q
What is the shape of a magnetic field of an electromagnetic similar to?
A
Its similar to the magnetic field of a bar magnet
6
Q
How can you make an electromagnet stronger?
A
Increasing the number of coils
Increasing the size of the current(by increasing the voltage)
Using an iron core
