physics

At a distance r1 from a point charge, the magnitude of the electric field created by the charge is 291 N/C. At a distance r2 from the charge, the field has a magnitude of 165 N/C. Find the ratio r2/r1.

I divided 165/291 and got .567

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asked by Naomi
  1. except the electric charge varies with the square
    1E = kq/r1^2 and r2/r1 = sqrt(E1/E2)

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    posted by Chanz

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