NEET Questions Solved

NEET - 2011

A galvanometer of resistance, G is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is

(a) S2(S+G)                                             (b) SG(S+G)

(c) G2(S+G)                                              (d) G(S+G)

Current will be unchanged if resistance remains same so

                    

                                G=GSG+S+RR=G-GSG+SR=G2G+S

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