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In the circuit diagrams (A,B,C and D) sh...

In the circuit diagrams (A,B,C and D) shown below, R is a high resistance and S is a resistance of the order of galvanometer resistance G. The correct circuit, corresponding to the half deflection method for finding the resistance and figure of merit of the galvanometer, is the circuit labeled as:

A

Circuit A with ` G=( RS )/( (R-S))`

B

Circuit D with `G=(RS )/( R-S)`

C

Circuit B with ` G=S `

D

Circuit C with G=S

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The correct Answer is:
A
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