Final answer:
The most common cause of electrical accidents is a combination of thermal and shock hazards.
Step-by-step explanation:
The most common cause of electrical accidents is a combination of thermal and shock hazards.
A thermal hazard occurs when excessive electric power causes undesired heating effects, such as starting a fire in the wall of a house.
A shock hazard occurs when electric current passes through a person, ranging in severity from painful to lethal.