Electromagnets Flashcards
How are electromagnets made
Wrapping a coil of wire around a magnetic core
Can electromagnets work without electricity
No they can be turned on and off by with electricity
How do you increase the strength of an electromagnet
Increase the number of turns in the coil
Increase the strength of the current
Use a more magnetic material for the core
Are electromagnets stronger than permanent magnets
Yes
What is a magnetic field
An area where a magnetic material will experience a force
Who do you find the shape of a magnetic field
Using plotting compasses
Using iron filings
What is a circuit breaker
A device that uses an electromagnet to break a circuit if the current is to big
What is a solenoid
Wire wound into a tight coil in (a part of an electromagnet)
Which way do magnetic field lines point
North Pole to the south pole
