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  • A miliammeter of range 10mA has a coil of resistance 1. To use it as an ammetre of range 1A, the required shunt must hav

A miliammeter of range 10mA has a coil of resistance 1\Omega. To use it as an ammetre of range 1A, the required shunt must have a resistance of 

Option: 1

\frac{1}{101}\Omega


Option: 2

\frac{1}{100}\Omega


Option: 3

\frac{1}{99}\Omega


Option: 4

\frac{1}{9}\Omega


Answers (1)

best_answer

As we learnt

 

Conversion of galvanometer into ammeter -

 

Connect a low resistance in parallel to the galvanometer

- wherein

 

S=\frac{i_g.G}{I-i_g}= \frac{0.01*1}{1-0.01}= \frac{1}{99}\Omega

Posted by

Anam Khan

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