magnetism Flashcards
(7 cards)
1
Q
what are the poles of magnets
A
the poles of magnets are the places where the magnetic forces are strongest
2
Q
what are two poles of a magnet called
A
North and south
3
Q
what do two like poles do?
A
repel each other
4
Q
explain why there is a force on the wire when there is a current in the wire? (motor effect)
A
there is a magnetic field due to the magnet
and the current in the wire produces a magnetic field
5
Q
how is a magnetic field created?
A
whenever electrons flow through the wire a magnetic field forms around the wire in circles
is also created by magnets
6
Q
flemings left hand rule
A
thumb-direction of force
first finger-direction of magnetic field
second finger-direction of current
7
Q
what is a permanent magnet?
A
a magnet that produces their own magnetic field all the time
