P2 - Charge Flashcards
What does friction cause electrons to do?
Some electrons jump from one surface to the other which means one surface is positively charged and one is negatively charged
What is the electrostatic series?
A series that shows us which materials give or take electrons because of friction
In the electrostatic series, which materials take electrons and which give electrons?
Materials at the top of the list are most likely to give electrons
Materials at the bottom are more likely to take electrons
What is electric current?
The flow of electric charge
Why is there a current in a circuit?
The positive end of the battery is positively charged and vice versa
The electrons in the negative end are attracted to the positive end because opposite charges attract
This causes the electrons to travel through the circuit to get there
What is double insulation?
When the live wire and the metal casing have an insulator between them to ensure the live wire can’t touch the casing
What is electrostatic induction?
When we use a charged object to make neutral objects charged
What is static electricity?
When the electrons cannot continue to move and complete the circuit because there is an insulator, this is called static electricity
What are the basic units of charge, voltage, current and power?
Charge is coulombs
Voltage is volts
Current is amps
Power is watts
What are the other units for voltage, current and power?
Voltage is joules per coulomb
Current is coulombs per second
Power is joules per second
What do electrically charged objects do?
They attract small objects places near them
What are conductors?
Materials that allow electrical charges to move easily through them
