Electric Circuits Flashcards
1
Q
Why does an atom have no charge?
A
It has an equal number of protons and electrons
2
Q
How can insulating materials become charged?
A
-When they are rubbed with another insulating material
- Electrons are transferred from one material to the other
3
Q
What is electric charge measured in?
A
Coulombs C
4
Q
What happens if two objects have a very strong electric field between them?
A
- Electrons in the air molecules will be strongly attracted towards the positively charged object
- If the electric field is strong enough, electrons will be pulled away from the air molecules and cause a flow of electrons between the two objects - this is a spark
5
Q
What is electric current?
A
- When charge flows
- The charge in an electric circuit is carried by electrons
