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Physics
Physics
Problem
Charges of
+
5
μ
C
+5\,\mu\text{C}
+
5
μ
C
and
−
3
μ
C
-3\,\mu\text{C}
−
3
μ
C
are placed at
O
(
0
,
0
)
O(0,0)
O
(
0
,
0
)
and
A
(
0
,
60
cm
)
A(0,60\,\text{cm})
A
(
0
,
60
cm
)
respectively. What charge
Q
Q
Q
must be placed at
B
(
80
cm
,
0
)
B(80\,\text{cm},0)
B
(
80
cm
,
0
)
so that the electric potential at
C
(
40
cm
,
0
)
C(40\,\text{cm},0)
C
(
40
cm
,
0
)
is zero? State the magnitude and sign of
Q
Q
Q
.
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