Asked by jason
A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire.
Answers
Answered by
drwls
p1^L1/D1^2 = p2*L2/D2^2 since resistances are equal.
(The p's are the resistivities, which you need to look up). Since L1 = L2,
D1/D2 = sqrt(p2/p1)
subscript "1" denotes silver and subscript "2" denotes platinum.
(The p's are the resistivities, which you need to look up). Since L1 = L2,
D1/D2 = sqrt(p2/p1)
subscript "1" denotes silver and subscript "2" denotes platinum.
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