What is the mathematical expression for Ohm's law?

Ohm's law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in a circuit. The correct expression, V = IR, indicates that the voltage across a conductor between two points is directly proportional to the current flowing through that conductor. The constant of proportionality is the resistance (R) of the conductor.

This relationship is crucial in circuit analysis and helps engineers design and understand electrical systems. For example, if you know the current flowing through a resistor and its resistance, you can easily calculate the voltage across it. This law is applicable in both simple and more complex circuit designs, making it a foundational concept in electronics and electrical engineering.

The other expressions involve relationships that are derived from or related to Ohm's law but do not represent it directly. For instance, V = P/I relates power (P) to voltage and current but does not capture the direct relationship defined by Ohm's law. V = I^2R is another expression that arises from Ohm's law when expressed in terms of power, but it is not the fundamental statement of Ohm's law itself. Lastly, V = R/I is not correct as it suggests a relationship that does not align