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AP EAMCET Engineering 2011 Solved Paper
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© examsnet.com
Question : 34
Total: 160
Two identical condensers
M
and
N
are connected in series with a battery. The space between the plates of
M
is completely filled with a dielectric medium of dielectric constant 8 and a copper plate of thickness
d
2
is introduced between the plates of
N
. (d is the distance between the plates). Then potential differences across
M
and
N
are, respectively, in the ratio
1
:
4
4
:
1
3
:
8
1
:
6
Validate
Solution:
Let the capacitance of condensor,
M
=
C
The new capacitance of condensor,
C
M
=
8
C
The capacitance of condensor,
N
=
C
The new capacitance of condensor,
C
N
=
C
′
2
where
C
′
=
A
ε
0
d
∕
4
=
4
A
ε
0
d
=
4
C
∴
C
N
=
C
′
2
=
4
C
2
=
2
C
Since the two condensers are connected in series
∴
V
M
:
V
N
=
1
C
M
:
1
C
N
=
1
8
C
:
1
2
C
=
1
:
4
⇒
V
M
:
V
N
=
1
:
4
© examsnet.com
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