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AIEEE 2007 Solved Paper
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© examsnet.com
Question : 58
Total: 118
An electric charge
10
−
3
µ
C
is placed at the origin
(
0
,
0
)
of
X
−
Y
co-ordinate system. Two points
A
and
B
are situated at
(
√
2
,
√
2
)
and
(
2
,
0
)
respectively. The potential difference between the points
A
and
B
will be
4.5
volts
9
volts
zero
2
volts
Validate
Solution:
The distance of point
A
(
√
2
,
√
2
)
from the origin,
O
A
=
|
→
r
1
|
=
√
(
√
2
)
2
+
(
√
2
)
2
=
√
4
=
2
The distance of point
B
(
2
,
0
)
from the origin,
O
B
=
|
→
r
2
|
=
√
(
2
)
2
+
(
0
)
2
=
2
units.
Now, potential at
A
,
V
A
=
1
4
π
E
0
⋅
Q
(
O
A
)
Potential at
B
,
V
B
=
1
4
π
E
0
⋅
Q
(
O
b
)
∴
Potential difference between the points
A
and
B
is zero.
© examsnet.com
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