Most workers in nanotechnology are actively monitored for excess static charge b

Question

Most workers in nanotechnology are actively monitored for excess static charge buildup. The human body acts like an insulator as one walks across a carpet, collecting -50 nC per step. What charge buildup will a worker in a manufacturing plant accumulate if she walks 27 steps? How many electrons are present in that amount of charge? If a delicate manufacturing process can be damaged by an electrical discharge greater than 10^12 electrons, what is the maximum number of steps that any worker should be allowed to take before touching the components?

Explanation / Answer

Charge Q = 27*(-50nC)

= -1350nC

Q = n e

-1350*10-9 = n *(- 1.6*10-19)

n = 843.75*1010 electrons

x * 50*10-9 = 1012*1.6*10-19

x = 3.2

X = 3 steps

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