The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. Above 15 mA, a pe

Question

The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. Above 15 mA, a person loses muscle control, and 70 mA can be fatal. A person with dry skin has a resistance from one arm to the other of about 1.1 × 105 Ω. When skin is wet, the resistance drops to about 5400 Ω. What is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin? Answer in units of V.

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Khánh Gia 3 years 2021-09-05T06:45:05+00:00 1 Answers 57 views 0

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  1. taiduc
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    2021-09-05T06:46:41+00:00
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    Answer: V_{min} = 110 V

    Explanation:

    Voltage is calculated by Ohm’s Law:

    V_{min} = i_{min} \cdot R_{dry}\\V_{min} = (0.001 A)\cdot(1.1 \times 10^5 \Omega)\\V_{min} = 110 V

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