Electricity Flashcards
What are currents measured in?
Amps
What is an electric current?
An electric current is the flow of electrons
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
CONDUCTING PATHWAY
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
PRODUCING ELECTRICITY
In a DRY cell (torch battery) or WET cell (car battery) a continuous chemical ______? Separates the charges
Reaction
PRODUCING ELECTRICITY
In a turning electrical generator a what effect separates the charges?
An electromagnet effect
Foil is a conductor or insulator?
A conductor
Steel wool is a conductor or insulator?
Conductor
A paper clip is a conductor or insulator?
A conductor
A paddle pop stick is a conductor or insulator?
An insulator
Porcelain is a conductor or insulator?
An insulator
Rubber is a conductor or insulator?
An insulator
Cotton is a conductor or insulator?
An insulator
Straw is a conductor or insulator?
An insulator
Conductor means?
Charged particles able to move
Insulator means?
No movement of charged particles
The ELECTRICAL RESISTANCE of a material is a measurement of?
How difficult it is for charged particles to move through it
