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In the figure, there is a very long hollow cylindrical layer with inner radius a and outer radius b on the same axis as the wire around a very long wire carrying charge density along λ. The bulk charge density in the cylinder layer is ρ.
a) Obtain q (inner) in terms of charge density and r distance, which you will use in the equation you will create with Gauss's law to find an electric field at a point perpendicular to the wire and at a distance r inside the cylinder layer.
b) λ = 3 × 10−9 C / m, ρ = 9 × 10−9 C / m3, a = 0.3 m, b = 0.7 m r = 0.5 m
Find the magnitude of the electric field at the point mentioned in A.
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