How is resistance calculated in an electrical circuit?

Resistance in an electrical circuit is calculated using Ohm's Law, which states that the voltage across a conductor is directly proportional to the current flowing through it, provided the temperature remains constant. This relationship is mathematically represented as ( V = I \times R ), where V is voltage, I is current, and R is resistance.

To find resistance, we can rearrange this formula to solve for R:

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

This indicates that resistance can be calculated by dividing the voltage (the electrical potential difference) by the current (the flow of electric charge) in the circuit. Therefore, the correct formula for calculating resistance is voltage divided by current. This relationship is fundamental in understanding how circuits function and is frequently applied in various practical electrical engineering scenarios.