Electromagnets Flashcards
Three magnetic metals
Iron, nickel and cobalt
What are electromagnets?
An electromagnet is a temporary magnet made by wrapping a coil of wire around a magnetic core
True or false.. permanent magnets are stronger than electro magnets
False! Electromagnet are stronger
How do you strengthen a electromagnet?
-increasing the number of turns on a coil around the core of an electromagnet
-increasing the current which is flowing through the coil of wire
What is a magnetic field?
An area where a magnetic material will experience a force
The closer together the magnetic field lines..
The stronger the magnetic field lines will be
Does the earth have its own magnetic field?
Yes it acts like a magnet inside the earths centre which allows compasses to work when navigating around the earth
What do circuit breakers do?
They detect large changes in current in a house, and will break a circuit.
