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Q.

Figures of merit of two galvanometers of resistance 100Ω and 50Ω, are 10–8 A/div and 2 × 10–5A/div respectively. In which case the voltage sensitivity is more ?

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a

more in case I

b

can’t say

c

more in case II

d

same in both cases

answer is A.

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Detailed Solution

Vg=1nV;n=VVg,nα1Vgn1n2=Vg2Vg1=2×10−5×5010−8×100;n1n2=103
voltage sensitivity is more in first galvanometer

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