alleryStart learning →A thermal hazard is defined by which situation?
ACurrent passing through a person
BExcess power causing unwanted heating
CStatic charge building on insulation
DA break in the earth wire of a circuit
Answer & Solution
Correct answer: B. Excess power causing unwanted heating
1. Every resistive element converts electrical energy into thermal energy.
2. It becomes a hazard when that conversion outruns the rate at which the heat can be safely dissipated.
3. So a thermal hazard is excessive electric power producing undesired heating.
4. Current through a person is the shock hazard, which is the separate category.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Thermal Hazards_
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