Measuring the latter allows a constant power load mode (as power = current * voltage). In his article, [Kerry] shows that he can simulate a load of up to 200W.

We can calculate the voltage across the thermistor under these conditions. First find the total resistance of the voltage divider. If the thermistor is moved to a freezer its resistance rises to ...

When resistors are connected in parallel, the supply current is equal to the sum of ... For the circuit above, the formula for finding the total resistance of resistors in parallel is \(\frac ...