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What is the effect of voltage frequency and current on resistance of the human body? |
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Answer» a. For touch voltages upto approximately 50V the value of impedance of the skin varies widely with surface area of contact, temperature, respiration etc. even for one person. b. For higher touch voltages in order of approximately 50V to 100V the skin impedance decreases considerably and becomes negligible when the skin breaks down. c. Wet hand contact resistance becomes very low at any voltage. d. With increase in frequency, impedance of skin decreases. |
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