The higher the voltage and shorter distance to the main power supply will create a greater ________.

• A. Arc and Blast
• B. Heat
• C. Shock
• D. Resistance

Answer: (A)

Arcing happens when the electric field between a live conductor and something nearby becomes strong enough to ionize the air. Increasing voltage strengthens that field, and a shorter gap makes breakdown more likely. When the air breaks down, a conductive plasma arc forms and the rapid heating and expansion of air creates an arc blast. So the scenario described—higher voltage with a shorter distance to the power source—produces an arc and the accompanying blast most directly. Heat, shock, and resistance aren’t driven in the same direct way by voltage and gap alone; heat depends on current and duration, shock on exposure, and resistance is a property of the material, not the immediate arcing condition.