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Standard XII
Physics
Gauss's Law
Question
If the electric flux entering and leaving an enclosed surface respectively are
ϕ
1
and
ϕ
2
the electric charge inside the surface will be:
(
ϕ
1
+
ϕ
2
)
ϵ
0
(
ϕ
2
−
ϕ
1
)
ϵ
0
ϕ
1
+
ϕ
2
ϵ
0
ϕ
2
−
ϕ
1
ϵ
0
A
(
ϕ
1
+
ϕ
2
)
ϵ
0
B
(
ϕ
2
−
ϕ
1
)
ϵ
0
C
ϕ
1
+
ϕ
2
ϵ
0
D
ϕ
2
−
ϕ
1
ϵ
0
Open in App
Solution
Verified by Toppr
Net electric flux ,
ϕ
=
ϕ
2
−
ϕ
1
Applying Gauss's law,
ϕ
=
∫
→
E
.
^
n
d
s
=
Q
e
n
c
l
o
s
e
d
ϵ
0
So,
Q
e
n
c
l
o
s
e
d
=
ϕ
ϵ
0
=
(
ϕ
2
−
ϕ
1
)
ϵ
0
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