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Question: Answered & Verified by Expert
Sensitivity of moving coil galvanometer is s. If a shunt of 18th of the resistance of galvanometer is connected to moving coil galvanometer, its sensitivity becomes
PhysicsMagnetic Effects of CurrentJEE Main
Options:
  • A s3
  • B s6
  • C s9
  • D s12
Solution:
1056 Upvotes Verified Answer
The correct answer is: s9
S=G8, S=Gn-1

G8=Gn-1

∴    8=n-1

∴    n=8+1=9

Since range of galvanometer has increased nine times its sensitivity reduces to 19 .

∴    S'=s9

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