static electricity

Question 1

what is static electricity caused by? give and example

Answer 1

2 objects rubbing together. this causes electrons to move from one object to another

e.g. rod has more negative and cloth has more positive. rod gains electrons and is now a negative charge. colts has a positive charge

Question 2

negative and negative =
positive and positive =
positive and negative =

Answer 2

repel
repel
attract

Question 3

what charge does protons, neutrons electrons have?

Answer 3

protons - positive
neutrons - neutral
electrons (on outside) - negative

Question 4

what happens on a van de graff?

Answer 4

• charge builds up on dome due to electrons being rubbed off by belt
• if big enough charge built the voltage becomes high enough to ionise air molecules
• the electrons jump down to earth ➡️ this is an electric current

Question 5

what particles can leave an atom and when they do, what is the atoms charge?

Answer 5

electrons and it becomes positive

Question 6

what is ‘static’ charge?

Answer 6

build up of charge and static is created when materials are rubbed together

Question 7

what are materials like wool and balloons called?

Answer 7

insulators ➡️ not easy to allow electrons to flow through