Opposite charges attract each other according to the Coulomb?s law:
For two charges, Q+ ans Q¯ separated by distance of R, Coulombic
attraction energy, (potential energy) is:
.E = (Q+ . Q¯)/(4ðåoR)
.E = Energy of electrostatic attraction, J (has a negative sign)
Q+ , Q¯ = magnitude of charges expressed as + and - values, (C)
R = charge separation distance, (m)
åo = 8.854 x 10-12 C2/(J.m)
ð = 3.14159
Bringing opposite charges together results in attraction and a lowering
of energy producing a negative value
Moderation Team
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