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How far must the point charges q1 = + 7.22 µc and q2 = - 32.5 µc be separated for the electric potential energy of the system to be - 117 j? cm?

Answers (1)
  1. Javed
    The formula that we wil be using is the formula for two charges q and Q separated by a distance r which is: U = kQq/r

    Where:

    U = electric potential,

    Q and q = point charges, and

    r = the distance between the point charges.

    So we are looking for 'r', rearranging the formula would give us:

    U*r = kQq

    r = kQq/U - > this will be the formula that we will be using.

    r = (9 x 10^9) * (7.22 x 10^-6) * (-32.5 x 10^-6) / - 117

    r = .01805 m
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