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Physics
Classical Physics
Electromagnetism
Let current from a Van de Graff generator flow through you
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[QUOTE="tech99, post: 6124944, member: 477979"] I think the criterion for heart safety is the number of Joules of energy delivered in the shock. It seems that defibrillators use about 200J ([URL]https://www.zoll.com/-/media/uploadedfiles/public_site/supporting_pages/biphasic/acls_defibrillation_protocols_with_zoll_rbw-pdf.ashx[/URL]) If the capacitance of the sphere is 20pF and the voltage is 200kV, the stored energy is only 0.5 * CV^2 = 0.4 J. Regarding lightning conductors, a lightning stroke follows a random zig zag path, following low resistance cells through the atmosphere, and searching for upward coming leaders. Leaders originate from all points, such as tree branches. The lightning conductor will send up a leader which intercepts any stroke passing with a few tens of metres of it. So it is just diverting a stroke locally to a safe point. It is believed that the shape of the rod has no effect on efficacy. It is usually assumed that a lightning conductor will divert a lightning stroke to itself over a radius equal to its height. A lightning conductor cannot discharge a cloud. [/QUOTE]
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Physics
Classical Physics
Electromagnetism
Let current from a Van de Graff generator flow through you
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