mickeyyyy6863 mickeyyyy6863

09-04-2020
Physics

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A long straight wire of length l( a) is made of two concentric conducting materials. The material of the inner tube for radius r ≤ a has a resistivity rho1. The material of the outer shell for radius a < r ≤ 2a has a resistivity rho2. The wire carries a total current I. (a) What is the total resistance R of the conducting wire.

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temdan2001 temdan2001

13-04-2020

Answer: R = rho/8api or

( rho2-rho1)/8pi

Explanation: you can substitute for rho = rh2 - rho1

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