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Examoogle • User • info@examoogle.com • EE-2024-8821
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How much electricity shock cause death passing through body?
10 mA
20 mA
50 mA
100 mA
100 mA
Quick Summary: A current flow of 100 mA (0.1 A) through the human body is generally considered the threshold for causing ventricular fibrillation, which is a fatal heart rhythm disturbance. At this magnitude, the current disrupts the electrical impulses controlling the heart, leading to cardiac arrest if not treated immediately.
A current flow of 100 mA (0.1 A) through the human body is generally considered the threshold for causing ventricular fibrillation, which is a fatal heart rhythm disturbance. At this magnitude, the current disrupts the electrical impulses controlling the heart, leading to cardiac arrest if not treated immediately.
Ibody=RbodyVapplied — Current passing through the human body based on Ohm's law
The human body acts as a resistive circuit. When subjected to a voltage, current follows Ohm's law (I=RV). Once the current exceeds approximately 30-50 mA, it causes involuntary muscle contraction (the 'let-go' threshold). As current reaches 100 mA, it forces the heart into ventricular fibrillation, where the heart muscles quiver instead of pumping blood, quickly resulting in death.
1-5 mA: Sensation of tingling, generally safe.
10-20 mA: Muscular contraction, 'let-go' threshold risk.
50 mA: Pain, respiratory paralysis can begin.
100 mA and above: Ventricular fibrillation, cardiac arrest.
Body resistance varies typically from 1,000 Ω to 100,000 Ω depending on skin moisture.
Electrical safety design
ELCB and RCD device calibration
First aid protocols for electrocution
The 'Let-go' threshold is the maximum current at which a person can release an energized object; exceeding this often leads to prolonged exposure.
The severity of an electric shock is determined by the magnitude, duration, and path of the current (specifically if it traverses the heart).
D is correct — A current of 100 mA passing through the body is sufficient to cause ventricular fibrillation, which is typically fatal.
Always remember that moisture significantly lowers skin resistance (dry skin ~100kΩ, wet skin ~1kΩ), making lower voltages potentially lethal.