Electromagnetics
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33 Terms
Cause of Electromagnetism
It occurs between any two charged particles
Affect of Electromagnetism
Results in opposites attract and similarities to repel
How many methods of electromagnetism are there
7
Do microwaves cause electromagnetic signals
Yes
What is needed to make a magnet
An electric current
Electromagnetic Induction
A current made by a changing magnetic field
Solenoid
Coiled wire around a steel or iron rod
Ferromagnetic material
A material that interacts with a magnetic field
Why does Iron attract to magnets
It has small permanent magnets in it
How do ferromagnetic materials stay ferromagnetic
They make their own magnetic field
What are iron, cobalt, steel, and nickle
Ferromagnetic materials
Lodestone
A rock that is a permanent magnet
What does the south pole of a magnet point to
The earth’s north pole
What does the north pole of a magnet point to
The earth’s south pole
In a magnet, where has the most magnetic field
The two ends of the poles
What happens if bits of iron is placed near a magnet
It will form curves around the magnet
Where are the magnetic fields the strongest visually
Where there are the most magnetic field lines in one circle
What is needed for a simple motor
Battey, magnets, wire
What is needed to make an electromagnet
Nail, wire, power source
What direction do field lines go in a magnet
North to south
What does a changing magnetic field do
Make a current in the wire
What will a current in a wire do
Make a magnetic field around the wire
Current
A flow of charged particles
Circuit
A complete path for electricity to flow
Resistance goes up
Current goes down
Voltage goes up
Current goes up
Temporary magnet
A material that behaves like a magnet
How can temporary magnets be made
An electric current flowing through a wire
What happens when two opposing magnetic fields pass each other
The object slows down
Is a conductor always ferromagnetic
No
Is copper ferromagnetic
No
What do car motors include
Electromagnets
Two devices that uses electromagnetic induction
Motors and generators