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Which one of the following modifications...

Which one of the following modifications may increase the senstivity of moving coil galvanometer?
`1^(st)` Way : By using spring of smaller torsion constant.
`2^(nd)` Way : By using a smaller coil
`3^(rd)` Way : By using a stronger magnet
`4^(th)` Way: By using a coil having fewer number of turns.

A

`1^(st)` and `4^(th)` ways only

B

`1^(st)` and `3^(rd)` ways only

C

`1^(st)` and `3^(rd)` ways

D

`2^(nd)` and `4^(th)` only

Text Solution

Verified by Experts

The correct Answer is:
B
Sensitivity `=(BNA)/(K)`, by increasing B (stronger magnet) and decreasing torison constant, k (weaker springs)
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