Flashcards in Electricity Deck (25):
What is an electric current?
An electric current is the flow of electrons
What are currents measured in?
A short is when?
The circuit overheats
Static electricity is?
An electric charge that is not moving
Electricity is cause by ?
Movement of electrical charges
- usually negatively charged electrons
- require a conductor to flow through
A battery's electrons start from where?
The negative terminal, and are attracted to the positive terminal
A current is?
The continuous movement of electrons
Electric charges do what?
(Mainly electrons) they move around an electric circuit, as they do so they carry electrical energy.
What is an electric exactly?
A closed conducting pathway
An electric circuit contains 3 parts, what are they?
1- a SOURCE of electrical energy
2- a CONDUCTING PATHWAY
3- LOAD (energy sink)
Where electrical energy is changed into another energy form
What is it called when the positive and negative charges become separated?
State of excitement
What will happen when a conducting pathway is provided?
The positives and negatives will try to get back together. As they do this the energy they had will get changed into some other form.
Eg. LIGHT, HEAT, MOVEMENT
In a DRY cell (torch battery) or WET cell (car battery) a continuous chemical ______? Separates the charges
In a turning electrical generator a what effect separates the charges?
An electromagnet effect
Foil is a conductor or insulator?
Steel wool is a conductor or insulator?
A paper clip is a conductor or insulator?
A paddle pop stick is a conductor or insulator?
Porcelain is a conductor or insulator?
Rubber is a conductor or insulator?
Cotton is a conductor or insulator?
Straw is a conductor or insulator?
Charged particles able to move
No movement of charged particles