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JEE Advanced 2023 Paper 2 Solutions
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© examsnet.com
Question : 1
Total: 52
An electric dipole is formed by two charges
+
q
and
−
q
located in
x
y
-plane at
(
0
,
2
)
mm
and
(
0
,
−
2
)
mm
, respectively, as shown in the figure. The electric potential at point
P
(
100
,
100
)
mm
due to the dipole is
V
0
. The charges
+
q
and
−
q
are then moved to the points
(
−
1
,
2
)
mm
and
(
1
,
−
2
)
mm
, respectively. What is the value of electric potential at
P
due to the new dipole?
V
0
4
V
0
2
V
0
√
2
3
V
0
4
Validate
Solution:
V
1
∝
p
1
cos
θ
1
r
1
3
V
2
∝
p
2
cos
θ
2
r
2
3
V
2
V
1
=
p
2
cos
θ
2
p
1
cos
θ
1
V
2
V
1
=
q
(
−
2
^
i
+
4
^
j
)
⋅
(
^
i
+
^
j
)
q
(
0
^
i
+
4
^
j
)
⋅
(
^
i
+
^
j
)
=
1
2
⇒
V
2
=
V
0
2
© examsnet.com
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