In Ohm's law, which formula represents the relationship between voltage, current, and resistance?

The formula that represents the relationship between voltage, current, and resistance according to Ohm's law is V = iR. In this equation, V stands for voltage (measured in volts), i represents current (measured in amperes), and R denotes resistance (measured in ohms). This equation indicates that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance acting as the proportionality constant. Essentially, if you know the current and the resistance, you can easily calculate the voltage.

The other choices provided each misrepresent the relationships defined by Ohm's law or do not align with the standard mathematical formulation. For example, V = R/i incorrectly suggests that voltage is the quotient of resistance and current, which is not how they interrelate in this law. Similarly, V = Ri^2 and V = i^2R complicate the equation unnecessarily, introducing squared terms that do not exist in Ohm's law. Thus, the correct understanding of Ohm's law is encapsulated succinctly in the formula V = iR.