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Q.

A galvanometer has resistance G and Current Ig produces full scale deflection. S1 is the value of the shunt which converts it into an ammeter of range 0 - I and S2 is the value of shunt for the range 0 - 2I. The ratio of S1 and S2 is

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a

2

b

12I−Ig2I−Ig

c

1 / 2

d

2I−IgI−Ig

answer is B.

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Detailed Solution

S1=Giig−1; S2=G2iig−1

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