p12 Flashcards
magnetic
what do unlike magnet poles do?
attract
what do you like magnet poles to do?
repel
what is a permanent magnet?
something that is what is magnetic
name for magnetic materials
cobalt, steel, iron and nickel
what do the concentration field lines represent?
The strength of the field
describe the direction of the magnetic field around bar magnets
from north and south
what apparatus can be used to show the shape and direction of a field around a magnet?
plotting compasses
what is the behaviour of a magnetic compass evidence for?
that the core of the Earth must be magnetic
how can you work out the direction of the magnetic field around a while?
thumb and fingers around
what does the strength of the field around a long straight conductor depend on?
The size of the current, and the distance from the conductor
what is a solenoid an example of
an electromagnet
where are the fields stronger in a solenoid?
Along the centre
why is the field week on the outside of a solenoid?
The fuel from individual coils cancel
what happens if a current carrying conductor is placed in a magnet
both experiencing equal force
what are magnetic forces due to?
interactions between magnetic fields
