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a constant current I in a strip line conductor ,resistivity of which increases monotonically in the direction of the current flow.if resistivities at cross sections A and B are ra and rb ,the excess charge accumulated in the section AB is |
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Answer» ρA∫ρB dρ = ρ]ρBρA ρ = ρB - ρA J = I/A ∴ E/ρ = I/A \(\frac{Q}{4\pi\varepsilon_0.r^2-\rho}\) = I/A Q = ɛ0.4πr2.ρ.\(\frac{I}{4\pi r^2}\) = ɛ0(ρB - ρA) I. |
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