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Question: Answered & Verified by Expert
Anammeter reads upto $1 \mathrm{~A}$. Its internal resistance is $0.81 \Omega$. To increase the range to $10 \mathrm{~A}$, the value of the required shunt is
PhysicsCurrent ElectricityVITEEEVITEEE 2011
Options:
  • A $0.09 \Omega$
  • B $0.03 \Omega$
  • C $0.3 \Omega$
  • D $0.9 \Omega$
Solution:
2064 Upvotes Verified Answer
The correct answer is: $0.09 \Omega$
Shunt S $=\frac{G I_{g}}{I-I_{g}}$ $=\frac{0.81 \times 1}{10-1}=\frac{0.81}{9} \Omega=0.09 \Omega$

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