Electrical Circuits Flashcards
What is the size of the electric current
It the rate of flow of electric charge
What is the potential difference between two points in an electric circuit
It is the work done (energy transferred) per coulomb of charge that passed between the points
Current potential different graphs are used to show what
How the current through a component varies with the potential difference across it
How can the resistance of a component be found
By measuring the current through and potential difference across the component
The current through a resistor at a constant temp is what
Directly proportional to the potential difference across the resistor
For components connected in series
The total resistance is the sum of the resistance of each component
For the components connected in parallel
The potential difference across each component is the same
The resistance of a thermistor decreases as
The temperature increased
The resistance of a LDR decreases
As the light intensity increases
What does an LED do
Emits light when a current flows through it in the forward direction
What is electric current
A flow of electric charge
