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Physics
Physics
Problem
Three identical point charges
+
q
+q
+
q
are placed at the vertices of an equilateral triangle of side length
a
a
a
. Calculate the total electric potential energy of the system. a)
6
k
q
2
a
\displaystyle \frac{6kq^{2}}{a}
a
6
k
q
2
b)
3
k
q
2
a
\displaystyle \frac{\sqrt{3}\,kq^{2}}{a}
a
3
k
q
2
c)
3
k
q
2
a
\displaystyle \frac{3kq^{2}}{a}
a
3
k
q
2
d)
3
2
k
q
2
a
\displaystyle \frac{3}{2}\,\frac{kq^{2}}{a}
2
3
a
k
q
2
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