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by mercuryrising
5019 days ago
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Ah ha! That's actually kind of cool. Power's given as: P = V^2 * R
R is given as: R = rhoL/(pir^2)
Substituting: and clumping constants: P = (V^2 / r^2) * (rho*L/pi)
Weight is proportional to r^2, we can see that voltage and weight are inverses of one another, and increasing the voltage for a fixed amount of power decreases the radius necessary to transmit it, decreasing the weight. I really wish I still had my lecture notes about the energy flow through free space, this is the best I could find online - http://amasci.com/elect/poynt/poynt.html. |
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