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A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -8.50 nC.

a) Find the magnitude of the electric field on the x-axis at x = 10.0 cm.

b) At what distance x does the result for the finite line of charge differ by 1.0% from that for the point charge?

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