Magnetism Flashcards
What do ‘like’ poles do?
repel each other
What do ‘unlike’ poles do?
attract each other
What are the ends of a magnet called?
the poles
What do magnetic materials / magnets create?
magnetic fields
The stronger the magnet, and the smaller the distance, the greater the [what]?
the attraction
In which direction do field lines flow?
from the north-seeking pole to the south-seeking pole
What principle does an electromagnet use?
that current through a wire generates an electromagnetic field
What is an electromagnet?
a wire coiled around a magnetic metal core. a cell / battery is used to generate a current for it
What is a solenoid?
the wire wrapped around a magnetic metal in an electromagnet
Is an electromagnet permanent?
no, it can be turned on and off by controlling its current
What is a magnetic force?
the non-contact force from a magnet on a magnetic material
What is a core in an electromagnet?
the magnetic metal in the centre
How does the field of an electromagnet decrease?
with distance
How can you make an electromagnet stronger?
how strong the current is; the number of coils in the solenoid; and the core
