Question

Assume that a particular person's skin is found to have a resistance of 1 x 105 Ω when dry and 1400 Ω when wet. How much current will flow into the body on contact with a 120 V household AC outlet with wet and dry skin. Please round your answers to one decimal place.

Answer 1

Answer:

current through dry = 1.2 mA

current through wet = 85.7 mA

Explanation:

given data

resistance dry = 1 × $10^{5}$ Ω

resistance wet = 1400 Ω

voltage applied = 120 V

to find out

current

solution

we get here current through dry skin I dry = $\frac{V}{R}$    ..................1

current = $\frac{120}{1*10^5}$ = 0.0012 A = 1.2 mA

and now we get

current through wet I wet = $\frac{V}{R}$ = $\frac{120}{1400}$ = 0.085714 A = 85.7 mA