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JEE Advanced 2016 Paper 2
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© examsnet.com
Question : 12
Total: 54
Consider two identical galvanometers and two identical resistors with resistance R. If the internal resistance of the galvanometers
R
C
<
R
2
, which of the following statement(s) about any one of the galvanometers is(are) true ?
[JEE Adv 2016 P2]
The maximum voltage range is obtained when all the components are connected in series
The maximum voltage range is obtained when the two resistors and one galvanometer are connected in series, and the second galvanometer is connected in parallel to the first galvanometer
The maximum current range is obtained when all the components are connected in parallel
The maximum current range is obtained when the two galvanometers are connected in series and the combination is connected in parallel with both the resistors.
Validate
Solution:
Range=
i
g
(
2
R
−
C
+
2
R
)
Range
=
2
i
g
×
R
e
q
=
2
i
g
(
2
R
+
R
C
2
)
=
i
g
(
4
R
+
R
C
)
R
C
<
R
2
2
R
C
<
R
⇒
Range in
1
<
3
i
g
R
Range in
2
>
4
i
g
R
So (B)
Range
=
2
i
g
+
2
i
g
R
c
R
=
2
i
g
(
1
+
R
C
R
)
Range
=
i
g
+
4
i
g
R
C
R
=
2
i
g
[
1
2
+
2
R
c
R
]
=
2
i
g
(
1
2
+
R
C
R
+
R
C
R
)
So (C)
© examsnet.com
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