2. Kiting during a storm. The legend that Benjamin Franklin flew a kite as a storm approached is only a legend – he was neither stupid nor suicidal. Suppose a kite string of radius 2.29 mm extends directly upward by 0.818 km and is coated with a 0.511 mm layer of water having resistivity 171 2.m. If the potential difference between the two ends of the string is 167 MV, what is the current through the water layer? The danger is not this current but the chance that the string draws a lightning strike, which can have a current as large as 500,000 A (way beyond just being lethal).

2. Kiting during a storm. The legend that Benjamin Franklin flew a kite as a storm approached is only a legend – he was neither stupid nor suicidal. Suppose a kite string of radius 2.29 mm extends directly upward by 0.818 km and is coated with a 0.511 mm layer of water having resistivity 171 2.m. If the potential difference between the two ends of the string is 167 MV, what is the current through the water layer? The danger is not this current but the chance that the string draws a lightning strike, which can have a current as large as 500,000 A (way beyond just being lethal).

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

2. Kiting during a storm. The legend that Benjamin Franklin flew a kite as a
storm approached is only a legend
Suppose a kite string of radius 2.29 mm extends directly upward by 0.818
km and is coated with a 0.511 mm layer of water having resistivity 171
2.m. If the potential difference between the two ends of the string is 167
MV, what is the current through the water layer? The danger is not this
current but the chance that the string draws a lightning strike, which can
have a current as large as 500,000 A (way beyond just being lethal).
he was neither stupid nor suicidal.

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