im not looking for the answer i just want to know how to do it, it would be a great help! 🙂
Power in watts = voltage , V X Current C in Amperes ,
so 2 watts power = 20 volts x current C in Amperes ,
therfore , Current drawn in the circuit , in Amperes = 2 watts / 20 volts = 1/ 10 or = 0.10 Amperes.
CURRENT = 2 / 20
Ohm’s law: P = V * I
so I = P/V = 2/20 = 0.1 A
I = W / V, where I=current, W=wattage, and V=voltage
Watts = volts*amps
You’ve got two of those quantities, so you can derive the third.