Question

The total electric field at a point on the axis of a uniformly charged disk, which has a radius R and a uniform charge density of σ, is given by the following expression, where x is the distance of the point from the disk. (R2 + x2)1/2 Consider a disk of radius R-3.27 cm having a uniformly distributed charge of +5.18 C. (a) Using the expression above, compute the electric field at a point on the axis and 3.30 mm from the center. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step Enter a number (b) Explain how the answer to part (a) compares with the field computed from the near-field approximation E o/2e0 They differ slightly. Score: 0 out of 0 Comment: (c) Using the first expression above, compute the electric field at a point on the axis and 33.0 cm from the center of the disk. 607682.0589 X Your response differs from the correct answer by more than 10%. Double check your calculations, NC (d) Explain how the answer to part (c) compares with the electric field obtained by treating the disk as a +5.18-HC charged particle at a distance of 33.0 cm

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