Which equation would you use to calculate resistance using Ohm's law?

To calculate resistance using Ohm's Law, the correct equation is derived from the relationship between voltage (E), current (I), and resistance (R). Ohm's Law states that the voltage across a conductor is equal to the current flowing through it multiplied by the resistance. This can be written as E = I * R.

To isolate resistance (R), you can rearrange the equation to R = E / I. This shows that resistance is equal to voltage divided by current. Therefore, the equation E / I directly leads to the calculation of resistance, confirming that this is the correct choice.

In the context of the other choices, they either represent incorrect formulations or relate to other electrical calculations that do not yield resistance based on Ohm's Law. Understanding this relationship is fundamental in electrical maintenance and troubleshooting, ensuring that you can accurately assess and measure electrical components in your work.