Express Ohm's Law as a formula?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. The correct formula is expressed as E = I x R, where E represents the voltage (electromotive force measured in volts), I represents the current (measured in amperes), and R represents the resistance (measured in ohms).

This formula demonstrates that the voltage across a conductor is directly proportional to the current flowing through it, multiplied by the resistance of that conductor. Understanding this relationship allows professionals to calculate any one of these three variables if the other two are known, which is crucial when designing circuits or troubleshooting issues in electrical systems.

The incorrect options either misrepresent the relationship defined by Ohm's Law or imply misunderstandings of how voltage, current, and resistance interact in electrical circuits. Thus, the correct choice directly reflects the principles laid out by Ohm's Law.