At approximately 2-10 milliamps of current, which sensation occurs?

At approximately 2-10 milliamps of current, which sensation occurs?

• A. No sensation
• B. Tingling
• C. Painful shock and inability to let go
• D. Severe burns

Answer: (C)

When current passes through the body, the sensations you feel scale with how much current is flowing. A few milliamps often produce a noticeable tingling. As the current climbs toward about 9–10 mA, the shock becomes stronger and can cause involuntary muscle contractions that make it hard to let go of the source. That higher, uncomfortable sensation—painful shock plus an inability to release the contact—fits the 2–10 mA range best, because at the lower end you’d mainly feel tingling, while the upper end brings the let-go difficulty. Burns require higher currents or longer exposure, and no sensation occurs at currents below perception thresholds.

When current passes through the body, the sensations you feel scale with how much current is flowing. A few milliamps often produce a noticeable tingling. As the current climbs toward about 9–10 mA, the shock becomes stronger and can cause involuntary muscle contractions that make it hard to let go of the source. That higher, uncomfortable sensation—painful shock plus an inability to release the contact—fits the 2–10 mA range best, because at the lower end you’d mainly feel tingling, while the upper end brings the let-go difficulty. Burns require higher currents or longer exposure, and no sensation occurs at currents below perception thresholds.