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A galvanometer having 30 divisions has a current sensitivity of 20μA/div.It has a resistance of 25 ohm. How will you convert it into an ammeter measuring upto 1 ampere. Find shunt to be used
  1. 0.15Ω
  2. 0.015Ω
  3. 0.030Ω 
  4. 0.30Ω


Solution

The correct option is B 0.015Ω
S=Gn1=2.5IIg1=25I600×1061=251000061=15010000=0.015Ω

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