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Chapter 20: Q28CQ (page 732)
Could a person on intravenous infusion (an IV) be microshock sensitive?
Yes, a person on intravenous infusion (an IV) cab be microshock sensitive because of IV ions.
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(a) Find the voltage drop in an extension cord having a \({\bf{0}}{\bf{.0600}}\;{\bf{\Omega }}\) resistance and through which \({\bf{5}}{\bf{.00}}\;{\bf{A}}\) is flowing. (b) A cheaper cord utilizes thinner wire and has a resistance of \({\bf{0}}{\bf{.300}}\;{\bf{\Omega }}\). What is the voltage drop in it when \({\bf{5}}{\bf{.00}}\;{\bf{A}}\) flows? (c) Why is the voltage to whatever appliance is being used reduced by this amount? What is the effect on the appliance?
Explain the properties of myelinated nerves in terms of the insulating properties of myelin.
Why isn鈥檛 a short circuit a shock hazard?
What is the current in milliamperes produced by the solar cells of a pocket calculator through which \({\bf{4}}{\bf{.00}}\;{\bf{C}}\) of charge passes in \({\bf{4}}{\bf{.00}}\;{\bf{h}}\)?
Foolishly trying to fish a burning piece of bread from a toaster with a metal butter knife, a man comes into contact with \({\bf{120 V AC}}\). He does not even feel it since, luckily, he is wearing rubber-soled shoes. What is the minimum resistance of the path the current follows through the person?
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