Agricultural Engineering 2025 – 400 Free Practice Questions to Pass the Exam

A larger cable size generally indicates greater capacity to carry current, higher conductivity, and lower resistance.

When a cable's size increases, it typically has a larger cross-sectional area, which allows for more electrons to flow through the conductor. This means that it can carry more current, a property referred to as its ampacity. Higher ampacity directly correlates to the ability of the cable to handle more electrical load without overheating or sustaining damage.

Additionally, larger cables have lower resistance due to the increased area for electron flow. Resistance is the opposition to current flow, and a larger diameter reduces the total path that electrons must travel, leading to a decrease in resistive losses. Furthermore, larger cables are often made from materials with higher conductivity, such as copper or aluminum, further enhancing their ability to conduct electricity efficiently.

Therefore, the correct answer reflects that a larger cable size encompasses higher conductivity, lower resistance, and greater capacity to carry current.