To calculate for the current, we simply have to take the
ratio of the voltage over resistance. That is:
Current, I = Voltage, V / Resistance, R
I = V / R
So for example if our voltage is 12.5 V and our resistance
is 30.0 ohms, current is:
I = 12.5 / 30
I = 0.417 A = 417 mA
