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JEE Main Physics Class 12 Electrostatic Potential and Capacitance Part 2 Questions
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© examsnet.com
Question : 58
Total: 100
The three charges
q
∕
2
,
q
and
q
∕
2
are placed at the corners
A
,
B
and
C
of a square of side 'a' as shown in figure. The magnitude of electric field (E) at the corner
D
of the square, is :
[28-Jun-2022-Shift-1]
q
4
π
∈
0
a
2
(
1
√
2
+
1
2
)
q
4
π
E
0
a
2
(
1
+
1
√
2
)
q
4
π
∈
0
a
2
(
1
−
1
√
2
)
q
4
π
∈
0
a
2
(
1
√
2
−
1
2
)
Validate
Solution:
|
E
0
|
=
k
q
∕
2
a
2
√
2
+
k
q
(
a
√
2
)
2
=
k
q
√
2
a
2
+
k
q
2
a
2
=
k
q
a
2
(
1
√
2
+
1
2
)
,
k
=
1
4
π
ε
0
© examsnet.com
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