What quantity do you need to measure along with voltage to check the correctness of resistance values?

To check the correctness of resistance values, measuring current alongside voltage is essential. According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) is defined by the equation V = I × R. By measuring both voltage across a component and the current flowing through it, you can calculate the resistance using the formula R = V/I. This allows for the verification of the resistance value as it should yield consistent results that affirm the resistance measurement.

For applications involving electrical circuits, knowing the current allows for accurate assessment of not just the static resistance value but also any changes that may occur due to factors like temperature variations or circuit load. This measurement is particularly important in ensuring that components operate within their specified ratings and can help diagnose potential issues within a circuit.