What is the formula for calculating current using voltage and resistance?

The formula for calculating current using voltage and resistance is derived from Ohm's Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

This relationship can be mathematically expressed as:

[ I = \frac{V}{R} ]

where I represents the current measured in amperes (A), V represents the voltage measured in volts (V), and R represents the resistance measured in ohms (Ω). This fundamental principle is essential in electrical and electronic engineering because it allows for the analysis of electrical circuits, enabling the determination of current flow when voltage and resistance are known.

The other formulations do not accurately represent this relationship, as they either incorrectly manipulate the basic variables or combine them in a way that does not adhere to Ohm's Law. Understanding this fundamental equation is key for anyone involved in electrical work or design, allowing for safe and effective management of electrical systems.