They experimented with various types of wire and different radii, but could not determine the relation between the voltage needed and the type of loop. A mathematician passing by noticed this, and offered to help. [2/4]
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After some tinkering and a few scribbled calculations, the mathematician came up with a formula describing what voltage was needed for each wire loop to break down. Amazed, the electrical engineer asked, "How did you derive the relation?" [3/4]
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"Simple!", said the mathematician. "I used the Volts and O-Wire Stress Theorem." [4/4]
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