Electricity Flashcards
what is current
the flow of electric charge round the circuit
what is the unit current?
amps A
what is the current of a single closed circuit?
the same everywhere
what is potential difference?
the driving force that pushes charge around
what is potential difference measured in
volts V
what is resistance?
anything in a circuit that slows the flow down
what is the resistance measured in?
ohms
what happens when the resistance in a cuircit is great?
the current is smaller
what is the measurement for charge?
coulombs
what is the equation that links charge current and time?
charge = current x time
what is time measured in in the charge equation?
seconds
how do you convert minutes to seconds?
TIMES BY 60
how do you put seconds to minutes?
DIVIDE BY 60
what is the diagram for the cell circuit symbol?
what is the formula linking potential difference, current and resistance?
potential difference =current x resistance
what happens to the resistance in ohmic conductors?
doesn’t change with the current
what happens when an ohimic conductor circuit is at a constant temperature?
the current flowing through is directly proportional to the potential difference across it
