Electrostatics Flashcards
1
Q
What is the charge of a neutron?
A
neutral
2
Q
What is the charge of a proton?
A
positive
3
Q
What is the charge of an electron?
A
negative
4
Q
What are electrons, protons and neutrons called?
A
Sub-atomic particles
5
Q
What relative charge do neutrons have?
A
no charge
6
Q
What relative charge do protons have?
A
+1
7
Q
What relative charge do electrons have?
A
-1
8
Q
Why are atoms neutral?
A
They have the same number of protons & electrons.
9
Q
What happens to atoms that gain/lose electrons?
A
They aren’t neutral and are known as ions.
10
Q
What happens to atoms when an electron is lost?
A
It becomes positive.
11
Q
What happens to atoms when an electron is gained?
A
It becomes negative.
12
Q
How are electrons lost or gained?
A
Through friction and transfer of electrons.
13
Q
How do precipitators work?
A
- smoke picks up a negative charge
- smoke particles are attracted to the positively charged plates
- collecting plates are knocked to remove the smoke particles
14
Q
How does paint spraying work?
A
- paint spray goes past a high voltage needle as it leaves the spray gun
- the tiny droplets of paint pick up a high voltage charge
- this attracts the positively charged paint droplets
