Basics
3 types of electric charges
positive charge, negative charge, neutral charge
Opposite poles of magnets have this effect on each other.
attract
Like poles of a magnet _________
repel
Compasses point
north
What is the charge on a proton?
positive
2 types of electricity
static electricity & current electricity
Name a way to increase the strength of an electromagnet
number of coil wrappings, using a larger iron core
The area around a magnet where the force is exerted
magnetic field
A magnet will pick up an object that is made of:
A. plastic
B. iron
C. copper
B. iron
What is the negative ion called?
electron
Increasing the distance between two objects with opposite net charges will result in increased/decreased force of attraction?
Decreased force of attraction
Magnetism produced by electric current is known as ______________
electromagnetism
True of False: All metals stick to magnets
When a current flows through a wire, this is produced
magnetic field
What is the neutral particle called and where is it located?
Neutron, nucleus of the atom
Advantage of using an electromagnet
ability to turn it on and off
These are groups of atoms which have aligned themselves to all face in the same direction
domains
To construct an electromagnet you need an iron core, a power source, and ____
wire
Which subatomic particles get transferred when objects rub up against each other? What is the result in the object's net charge?
electrons, negative charge