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3. A rod, length = 8.0 cm, has an uniform charge of 2.4 μ Coul. The rod lies on the x-axis with the right end at the origin. (a) What is the linear charge density, > ? (b) Derive the expression for the electric field created by the charged rod as a function of the distance x from the end of the rod. (in terms of λ, x, L, k)

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