Magnets And Electromagnets Flashcards
What are the two forces between magnets?
Repelling and attracting
What are the three magnetic elements?
Iron , cobalt and Nickel
Give an example of a use of a magnet
In MRI scans or to seal a fridge door
What are three things that affect the strength of an electromagnet?
The core material,the current strength and the number of turns of the coil
What are some of the uses of electromagnets?
In motors,electric bells and speakers or ear phones
Advantages of an electromagnet
It can be turned on or off
You can change the strength of the magnet
What is a relay?
It’s a switch based on an electromagnet that lets one current turn on another.
Magnetic field on a current carrying wire looks like..
It rotates in multiple circles around the wire, the direction depends on the flow of the current
What is a magnet?
An object that attracts or repels a magnetic material. They are often made from iron
What is a magnetic material?
They are objects that don’t attract or repel each other but are attracted to magnets
What is a magnetic field?
It’s an area or space which you can detect magnetic forces
