current, potential difference and resistance

Cards (8)

what is an electric current
the flow of electric charge
what is the equation linking charge, current and time
charge= current x time
what two factors does the current in a circuit rely on
potential difference and resistance
how do you calculate potential difference
potential difference= current x resistance
what is an ohmic conductor
a conductor where the current and potential difference are directly proportional
name 2 components for which resistance is not constant as current changes
lamps and diodes
what happens to the resistance of the filament lamp as temp increases
resistance increases due to ions in the metal having more energy
what happens to the resistance of a thermistor as temp increases
it decreases