What will the electric potential energy be if one of the charges is completely removed and replaced by a nega?
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It will be -U1.
Potential energy is U = kQq/r
Where r is the distance between them, Q and q are the charges and k is a constant ( = 1 / (4 * pi * E0) …. E0 is the permittivity of free space)
In the equation all you’re doing is replacing Q with -Q, which just flips the sign once you multiply and you’re left with -U1.
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