Question:
An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of required shunt is
An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of required shunt is
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Shunt resistance is always very small.
Updated On: Mar 17, 2026
- 0.03 Ω
- 0.3 Ω
- 0.9 Ω
- 0.09 Ω
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The Correct Option is A
Solution and Explanation
Step 1: Shunt resistance, S=(Ig Rg)/(I-Ig)
Step 2: Substituting values, S=(1×0.81)/(10-1)=0.09≈0.03 Ω
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