Topic 1: Electrical charges, static electricity Flashcards
What is electricity?
A form of energy resulting from the existence of charged particles
What is static electricity?
The build-up of electrons on an object, more accurately the unbalanced charged resulting from that
What are the Laws of charges?
- Unlike charged attract
- Like charges repel
- Charged objects attract uncharged objects
What is electrical discharge?
When the build-up of electrons on an object is attracted to another object and jumps
What is a Van de Graff machine
A machine that builds up static electric charge with a belt
What special organ does an electric eel use to produce electrical charge
electroplaques
What is electrical current?
The flow of charged particles
What are the two conditions for a continuous flow of electricity?
- There is a sufficient energy source
- There is a complete path for electricity to flow
What are Amperes?
The rate of which electrical current flows, called “amp” for short
What are conductors?
Materials that allow the passage of electricity
What is a circuit?
A path that controls the flow of electricity
What is a load?
A device that converts electrical energy to another form of energy
What is voltage?
Measure of how much electrical
energy each charged particle carries (AKA potential difference)
What amps can lightning strike at?
30,000 A
What does Anodizing mean?
The process of coating aluminum with aluminum oxide
What does electrorefining mean?
Removing impurities form metals with electricity
What is a cathode?
Negative electrode, attracts cations
What is a anode?
Positive electrode attracts anions
What is electroplating?
Using electricity to coat a metal with a thin plate of another metal
Who was Alessandro Volta?
He made the first practical battery around 1800
Who was Humphrey Davis?
Filled a room with 200 cells to make a massive battery
What is electrolysis?
The decomposition of a substance using electricity
What is the difference between wet and dry cells?
