Hint: Manipulate Ohm’s Law…does resistance increase or decrease with increased cabling diameter/

When comparing thick and thin cabling, you have to first understand the fundamental difference between the two. The resistance of a thin cable is greater than that of a thick cable because at an atomic level, a thin wire has fewer electrons to carry the current.

As such, the relationship between the area of a cable’s cross section and resistance is inversely proportional (more resistance with thinner cabling). Knowing Ohm’s Law, we can manipulate the power equation to get this relationship between resistance and power draw.

- Ohm’s Law

V = IR

- Power Equation

P = IV

P = I^2R

As such, thinner cabling has greater power draw. For high power applications, thicker cabling is used for safety purposes in less heat generation.

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