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Physics
Physics
Problem
A square
A
B
C
D
ABCD
A
B
C
D
of side
a
a
a
has charges placed at its corners as follows:
+
q
+q
+
q
at
A
A
A
and
C
C
C
,
−
q
-q
−
q
at
B
B
B
and
D
D
D
. What is the magnitude of the net force on the charge at corner
A
A
A
? a)
(
2
+
0.5
)
k
q
2
/
a
2
(\sqrt{2}+0.5)\,k q^{2}/a^{2}
(
2
+
0.5
)
k
q
2
/
a
2
b)
k
q
2
/
a
2
k q^{2}/a^{2}
k
q
2
/
a
2
c)
(
2
−
0.5
)
k
q
2
/
a
2
(\sqrt{2}-0.5)\,k q^{2}/a^{2}
(
2
−
0.5
)
k
q
2
/
a
2
d)
2
k
q
2
/
a
2
\sqrt{2}\,k q^{2}/a^{2}
2
k
q
2
/
a
2
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