The figure indicates one reason no one should stand under a tree during a lightn

Question

The figure indicates one reason no one should stand under a tree during a lightning storm. If lightning comes down the side of the tree, a portion can jump over to the person, especially if the current on the tree reaches a dry region on the bark and thereafter must travel through air to reach the ground. In the figure, part of the lightning jumps through distance d in air and then travels through the person (who has negligible resistance relative to that of air). The rest of the current travels through air alongside the tree, for a distance h. If d/h-0.405 and the total current is I 5210 A, what is the current through the person? Lightning current Number Units

Explanation / Answer

for the part in air,

Vair = Iperson * Rperson

for part along the tree,

Vtree = I - Iperson * Rtree

As both the parts are parallel, we can say

Vtree = Vair

we get,

Iperson = I / 1 + d/h

Iperson = 5210 / 1 + 0.405

Iperson = 3708.2 amps

sadly, this person will surely die...

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