AC shocks are often more dangerous than DC shocks because they involve higher voltages that _________.

• A. Seize up your muscles
• B. Stop breathing
• C. Paralyze your legs
• D. Cause immediate unconsciousness

Answer: (A)

AC shocks are more dangerous because the alternating current keeps your muscles in a state of tetany, causing them to seize up and grip the conductor. The current reverses direction with each cycle, continuously stimulating nerves and muscles, so you can’t let go, which prolongs contact and raises the risk of injury. While DC shocks can cause a strong initial jerk that may throw you away from the source, reducing contact time, the key hazard described here is the muscle seize-up that makes release difficult.