OHMIC Resistance Measurement

The procedure for measuring relatively high ohmic resistance (RHR) is shown. The indirect method is used, which allows determining the best estimate of the magnitude of an ohmic resistance. This procedure is an alternative to make an exact estimate of the magnitude of a resistance. greater than 10 Ω. Starting from Ohm's law, the mathematical model is developed that considers the readings of voltmeter, ammeter and thermometer; this model implies correction for temperature at 20 °C of the measured magnitude. In addition, an experimental example is shown, the magnitude obtained is compared against the measurement made with a Wheatstone bridge.