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Physics
Physics
Problem
A charge
+
Q
+Q
+
Q
is fixed at
(
−
a
,
0
)
(-a, 0)
(
−
a
,
0
)
on the x-axis, and a charge
−
2
Q
-2Q
−
2
Q
is fixed at
(
+
a
,
0
)
(+a, 0)
(
+
a
,
0
)
. Determine the ranking, from greatest to least, of the magnitudes of the net electric field at the following three locations: • P at
(
0
,
0
)
(0, 0)
(
0
,
0
)
• R at
(
0
,
2
a
)
(0, 2a)
(
0
,
2
a
)
• S at
(
3
a
,
0
)
(3a, 0)
(
3
a
,
0
)
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