Question T0A02
From subelement T0 - T0A
What health hazard is presented by electrical current flowing through the body?
Why is this correct?
All three choices are correct because electrical current affects the body in multiple dangerous ways. Current causes tissue heating (like a heating element inside your body), disrupts normal cellular electrical functions (especially heart rhythm and nervous system), and triggers involuntary muscle contractions. Even small currents can be lethal - only 100 mA can cause death. When a question lists multiple accurate hazards and includes 'All these choices are correct,' that's typically the answer.
Memory tip
For 'All these choices are correct' questions, read each option as a true/false statement. If all individual statements are factually accurate about the topic, then 'All choices' is right. This pattern appears frequently in safety questions where multiple hazards or protective measures exist.
Learn more
Understanding these three mechanisms helps explain why electrical safety protocols exist. Tissue heating causes burns, cellular disruption affects heart rhythm (why CPR training matters for electrical work), and muscle contractions can prevent someone from letting go of an energized conductor. This knowledge connects to Part 97 requirements for proper station grounding and safety practices that protect both operators and equipment.
Think about it
Why do you think even experienced electricians follow lockout/tagout procedures and never work on live circuits when possible?