How does static electricity occur?
when there is a build up or shortage of electric charge (electrons) on the surface of a material
Why is it called static?
It’s called “static” because the built up charges don’t move.
What does the electricity we use everyday involve? and what is that called?
The electricity we use everyday involves moving charges, current electricity
Where do charges come from?
from electrons and protons
What is matter made of?
atoms
What happens when two different materials are rubbed against each other? What is that called
electrons can be transferred between them, causing an imbalance in charge. charging by friction
can electrons easily move?
yes
can protons easily move?
no they dont move at all
what happens when a material gains electrons?
it develops a (-1) charge
What happens when a material loses its electrons?
it gets a (+) charge
can electrons leave their atoms?
yesc
What is the law of electric charge?
When two charged objects are placed near each other, they exert a force on each other
What happens if objects have different charges?
they attract
What is the electrostatic series?
a list of materials in order of increasing tendency to gain electrons.
what happens as you move further down the list?
the materials gain extra negatively charged electrons
What happens as you move higher on the series
the material loses electrons and become positively charged
What happens if objects have the same charges?
they repel
Whats an insulator? give an example
materials that do NOT allow electrons to flow through them easily. a balloon CAN be easily charged by friction as the extra electrons gained CANNOT easily escape.
what is an conductor? give an example
materials that allow electrons to flow through them easily. Silver CANNOT be easily charged by friction as the extra electrons gained CAN easily escape.
What is charging by contact? example?
its a method of transferring electric charge between two objects through direct physical touch like when u touch a conductive doorknob the electrons jump over to the metal giving u a shock
What is charging by induction?
When a neutral object gets a charge without touching another object
What happens when a negatively charged rod is put near a neutral metal ball of the electroscope?
it can INDUCE CHARGE SEPARATION
what happens to the top of the ball when a negatively charged rod comes near it?
it becomes positive
what happens to the bottom of the ball when a negatively charged rod comes near it?
it becomes negative
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