A 10A DC Ammeter has a resistance of 1 Ω is to be extended to 50 A, the required shunt wire is :

 

  1. Constantan wire of 25 m Ω
  2. Constantan wire of 20 m Ω
  3. Manganin wire of 20 m Ω
  4. Manganin wire of 25 m Ω

 

Anurag Mishra Professor Asked on 14th January 2016 in Physics.
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