2.14 know and use the relationship between voltage, resistance and current.

Voltage = current x resistance

V         =      I       x      R


Example..

a 4Ω resistor in a circuit has a voltage of 6V across it. What is the current through the resistor?


Firstly, rearrange the equation because we are finding I, the substitute what we know into it...

I = V/R

Therefore, Current = V/R = 6/4 = 1.5 A

Current = 1.5 A