A 12 gauge wire will safely carry more _____ than a 16 gauge wire

• A. Voltage
• B. Capacitance
• C. Amperage
• D. Resistance

Answer: (C)

The important idea here is ampacity—the amount of current a wire can carry safely. A thicker wire has a larger cross-sectional area, which means lower resistance per unit length and better ability to dissipate heat. When current flows, heat generated is proportional to I^2R; with a lower resistance, the same current produces less heat, and you can push more current through before the insulation overheats. So a 12 gauge conductor can carry more amperage than a 16 gauge conductor. Voltage rating is about insulation and safety margins, not how much current the wire can carry; capacitance is influenced by conductor geometry and insulation but isn’t the measure of safe current. Therefore, amperage is the correct concept.