magnetism Flashcards
1
Q
hard magnet
A
hard to magnetise keeps its magnetism
2
Q
soft magnet
A
easy to magnetise loses magnetism quickly
3
Q
how to magnetise an iron nail
A
- the coil of wire lines up the domains( magnetic fields of electrons)
4
Q
right hand grip
A
-right hand grip tells you the direction of the field lines around the wire- thumb shows the direction of current. CURL OF FINGERS show the direction of magnetic field lines
5
Q
motor effect
A
- when you place a current carrying wire in a magnetic field, there’s a force on the wire
- the wire moves
this is the motor effect, used in electric motors
6
Q
left hand rule
A
- thumb= motion
- first finger = magnetic filed (north to south)
- second finger = current ( positive to negative)
7
Q
magnetic materials
A
- iron, nickel and cobalt
