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NEET 2021 Physics and Chemistry
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© examsnet.com
Question : 24
Total: 100
Two charged spherical conductors of radius
R
1
and
R
2
are connected by a wire. Then the ratio of surface charge densities of the spheres
(
σ
1
∕
σ
2
)
is
[NEET 2021]
R
1
R
2
R
2
R
1
√
(
R
1
R
2
)
R
1
2
R
2
2
Validate
Solution:
👈: Video Solution
When two conductors are connected by a conducting wire, then the two conductors should have same potential.
so,
V
1
=
V
2
∴
1
4
π
ε
0
Q
1
R
1
=
1
4
π
ε
0
Q
2
R
2
⇒
1
4
π
ε
0
Q
1
R
1
×
R
1
R
1
=
1
4
π
ε
0
Q
2
R
2
×
R
2
R
2
⇒
Q
1
R
1
4
π
R
1
2
ε
0
=
Q
2
R
2
4
π
R
2
2
ε
0
⇒
σ
1
R
1
ε
0
=
σ
2
R
2
ε
0
⇒
σ
1
σ
2
=
R
2
R
1
© examsnet.com
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