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A galvanometer has a sensitivity of 60 d...

A galvanometer has a sensitivity of 60 division/ampere. When a shunt is used its sentivity becomes 10 divisions/ampere. What is the value of shunt used if the resistance of the galvanometer is `20Omega`?

A

`4 Omega`

B

`5 Omega`

C

`20 Omega`

D

`8 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A

`I_g=(51)/(100)=0.05I`
`S=((I_g)/(I-I_g))g=((0.05I)/(I-0.05I))G=(G)/(19)` .
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