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| 1. |
Resistivity of the material of a conductor of uniform cross-section varies along its length as `rho=rho_(0)(1+alpha x)`. Find its resistance if its length is L and area of cross-section is A. |
| Answer» `dR=rho(dx)/(A)=rho_(0)(1+alphax)(dx)/(A),thereforeR=int_(0)^(L)dR` | |