Static electricity discharges become perceptible to a person at approximately how many volts?

Static electricity discharges become perceptible to a person at approximately how many volts?

• A. 500
• B. 1200
• C. 3500
• D. 2000

Answer: (C)

Static discharges become perceptible when the stored charge is high enough to drive a noticeable current through the body, enough to stimulate nerve endings. In air, a spark large enough to be felt by a person typically occurs around three and a half thousand volts. That’s the practical threshold used in safety training: below this level the discharge often isn’t felt under normal conditions, while around 3,500 volts the spark is readily perceptible. Humidity, skin condition, and the gap size can shift the exact value a bit, but three and a half kilovolts is the standard cue.

Static discharges become perceptible when the stored charge is high enough to drive a noticeable current through the body, enough to stimulate nerve endings. In air, a spark large enough to be felt by a person typically occurs around three and a half thousand volts. That’s the practical threshold used in safety training: below this level the discharge often isn’t felt under normal conditions, while around 3,500 volts the spark is readily perceptible. Humidity, skin condition, and the gap size can shift the exact value a bit, but three and a half kilovolts is the standard cue.