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MHT CET 2017 Physics Solved Paper
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© examsnet.com
Question : 3
Total: 50
Sensitivity of moving coil galvanometer is ‘S'. If shunt of
1
8
th of the resistance of galvanometer is connected to moving coil galvanometer, its sensitivity becomes
S
3
S
6
S
9
S
12
Validate
Solution:
S
=
G
8
( Given ) .......(i)
And,
S
=
G
n
−
1
.......(ii)
From eqs. (i) and (ii)
G
8
=
G
n
−
1
⇒ 8 = n - 1
∴ n = 8 + 1 = 9
Since, the range of galvanometer is increased by 9 times, therefore its sensitivity reduces to
S
9
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