P2
Resistance
Current and circuit symbols
click to edit
series and parallel
Current is the flow of electrical charge
Electric charge will only flow round a complete closed circuit if there is a potential difference
Total charge depends on current and the time
circuit symbols
PD or voltage is the driving force that pushes the charge round
more charge passes round when there is a bigger current
charge=current x time
you can investigate factors affecting resistance
volts=current x resistance
to do this you need to incoporate a voltmeter or an ammeter
parallel circuit
series circuits
Resistance adds up
potential difference shared and the current is the same
v1+v2
I1=I2
click to edit