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On what factors, does the potential gradient of the potentimeter wire depend? |
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Answer» The fall of potential across a potentiometer wire of length l is given by `V = IR = I rho l //A` `:.` Potential gradient, `K=V/l = (I rho)/(A)` Thus potential gradient of a wire depends upon the following factors: (i) `K prop I` (i.e., current passing through the potentiometer wire) (ii) `K prop rho` (i.e., specific resistance of the material of the potentiometer wire) (iii) `K prop 1/A`, where A is the area of cross-section of the potentiometer wire. |
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