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Physics
Which of the following holds if there was only one type of charge in the universe?
Q. Which of the following holds if there was only one type of charge in the universe?
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NTA Abhyas
NTA Abhyas 2020
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A
∮
s
E
→
⋅
d
s
→
=
0
on any surface.
B
∮
s
E
→
⋅
d
s
→
=
0
if the charge is outside the surface.
C
∮
s
E
→
⋅
d
s
→
=
ϵ
0
q
if charge of magnitude
q
were inside the surface.
D
Both
(
B
)
and
(
C
)
are correct.
Solution:
According to Gauss’s theorem in electrostatics
∮
e
E
→
⋅
d
→
s
=
ϵ
0
q
Here
q
is charge enclosed by the surface.If the charge is outside the surface, therefore
q
s
n
s
i
d
e
=
0
Also,
∮
e
E
→
⋅
d
→
s
=
0
.So both (b) and (c) are correct.