How far from a -7.40 μC point charge must a 2.50 μC point charge be placed in order for the electric potential energy of the pair of charges to be -0.600 J ? (Take the energy to be zero when the charges are infinitely far apart.) Express your answer in meters
let
q1 = -7.4 micro C
q2 = 2.5 micro C
let d is thebrequired distance.
we know, potential energy of the pair of charges U = k*q1*q2/d
d = k*q1*q2/U
= 9*10^9*(-7.4*10^-6)*(2.5*10^-6)/(-0.6)
= 0.2775 m
How far from a -7.40 μC point charge must a 2.50 μC point charge be placed...
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