magnets Flashcards
1
Q
why would two magnets attract
A
the poles are opposite
2
Q
what direction do magnetic field lines go in
A
north to south
3
Q
what is an electromagnet
A
a solenoid wrapped around an iron core
4
Q
how can you increase the stregnth of an electromagnet
A
increase coils in wire
increase current
iron core
5
Q
what rule helps you tell the motion
A
flemmings left hand rule
6
Q
what does magnetic flux density measure
A
the strength of the magnetic field
7
Q
what is ued to increase or decrease the voltage
A
transformers
8
Q
A
