What is the correct formula to calculate resistance using current and voltage?

The relationship between current, voltage, and resistance is governed by Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R), or V = I * R. To find the resistance, you can rearrange this formula to isolate R: R = V/I.

Thus, when calculating resistance using voltage and current, the correct approach is to divide the voltage (measured in volts) by the current (measured in amps). This leads to the formula for resistance being calculated as volts per amp (V/A). This is why the first choice, which represents this formula as Volts/Amps, is correct.

The other options do not represent the correct relationship defined by Ohm's Law. For example, dividing amps by volts does not yield a measurement of resistance, as does Watts divided by either amps or volts, which instead relate to power calculations. Understanding this foundational concept is crucial for accurately applying electrical principles in practical scenarios.