What does 'I' represent in the voltage drop formulas?

In voltage drop formulas, 'I' represents the current in amperes. This is essential because the voltage drop across a conductor is directly proportional to the current flowing through it. This relationship is typically defined by Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R).

In the context of voltage drop, as the current increases, the voltage drop across the conductor will also increase, assuming the resistance remains constant. Understanding this variable is critical for calculating how much voltage will be lost as electricity travels through a wire, ensuring that the load receives sufficient voltage for proper operation.

The other options refer to different components of the voltage drop equation, but they do not define 'I'. Resistance is a measure of opposition to current flow, voltage supplied is the initial voltage before any losses, and total length in feet relates to the physical length of the conductor, which also affects resistance but is not represented by the letter 'I'.