Electricity Flashcards
Static electricity definition
Buildup of negative charge (electrons) which are released
An object is charged when
Electrons are added or taken away
Resistance definition
How hard it is for current to pass through a component / circuit
If you add resistors in a series circuit the current
Increases
If you add resistors in parallel the current
Decreases
AC meaning
The current constantly switches directions
DC meaning
Current that flows in a single direction
Where does DC come from 2 things
Battery
AC current through a diode
Current definition
Flow of electrons around a circuit
In a series circuit the current is
The same everywhere
In a parallel circuit the current
Is the sum of the current flowing through all the branches
Fixed resistor graph line
Straight line that passes through origin
y = current
x = potential difference
Filament bulb graph line
Passes through origin and levels off in positive and negative section
y = current
x = voltage
Diode graph line
At zero until positive voltage
through origin
y=current
x=voltage
LDR and Thermistor graph line
Hyperbola
Potential difference
Amount of energy transferred to each component by each unit of charge
In a series circuit potential difference
The sum of all of the components voltage
The component with the most resistance receives the most voltage
In a parallel circuit potential difference
Is the same in every branch
Plug and wire of an electrical plug are coated in
Plastic
Live wire colour
Brown
Earth wire colour
Green
Neutral wire colour
Blue
What is the fuse connected to
Live wire
Earth wire is used
To ground the electricity and provides a safe route for the electricty to go if the live wire touches the casing
