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Physics
Physics
Problem
Three equal charges, each
+
q
+q
+
q
, are placed on the corners of an equilateral triangle. The electric field intensity at the centroid of the triangle is (1)
k
q
/
r
2
kq/r^2
k
q
/
r
2
(2)
3
k
q
/
r
2
3kq/r^2
3
k
q
/
r
2
(3)
3
k
q
/
r
2
\sqrt{3}kq/r^2
3
k
q
/
r
2
(4) zero
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