If 10% of the main current is to be pass...

If 10% of the main current is to be passsed through a maving coil galvanometer of resistance `99 Omega`, then the ratio of its resistance and the shunt resistance will be

A

`1:9`

B

`9:1`

C

`1:11`

D

`11:1`

Text Solution

Verified by Experts

The correct Answer is:

B

If N is the number of division on the galvanometer scale, then`I_g=N/60 and I=N/0 therefore I_g=(S/(S+G))I thereforeN/60=(S/(S+20)) xx N/10therefore6S=S+20 thereforeS=4Omega`.

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