1. The problem statement, all variables and given/known data A zener diode runs off 10V and supplies 5V to a load that draws 100mA. The minumum zener current = 5mA. R = 47Ω What is the dissipation in the resistor if the output is short-circuited? 2. Relevant equations None. 3. The attempt at a solution Using R = V - Vz / Izmin + Iload: I said Iload = 0 (since the output is short-circuited) then: R = V - Vz / Izmin + 0 = 10 - 5 / 0.005 = 1000Ω Power of R = (V - Vz)^2 / R = (10 - 5)^2 / 1000 = 0.025W But the correct answer was 2.13W. Could someone please tell me what I did wrong?