Static Electricity Flashcards
Static electricity is all about what?
Charges which are not free to move.
A static shock end with a what?
Shock or spark, when they finally move.
A build-up of static is caused by what?
Friction.
What will happen when insulating materials are rubbed together?
Negatively charged electrons will be scraped of one and dumped on the other.
After the insulating materials have rubbed together what will happen?
There will be a positive static charge on one.
Negative static charge on the other.
Which way the electrons are transferred depends on what?
The 2 materials involved.
What do electrically charged objects attract?
Small objects placed near them.
Give a classic example
Polythene and acetate rods being rubbed with a cloth duster.
What happens with the polythene rod?
Electrons move from the duster to the rod.
What happens with the acetate rod?
Electrons move from rod to duster.
What only moves and what never moves?
Electrons move.
Positive charges don’t.
Both positive and negative electrostatic charges are only ever what?
Produced by the movement of electrons.
A positive static charge is always caused by what?
Electrons moving away elsewhere.
The material that loses the electrons loses what?
Some negative charge.
Left with an equal positive charge.
When 2 electrically charged objects are bought close together, what happens?
They exert a force on one another.
