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  • Millimeter of range gives full scale deflection for a current of <img alt="100 \mathrm{

Millimeter of range 10 \mathrm{~mA} gives full scale deflection for a current of 100 \mathrm{~mA} when a shut of 0.1 \Omega is connected in parallel ts it. The coil of the milliammeter has a resistance-
 

Option: 1

0.9 \Omega
 


Option: 2

1 \Omega
 


Option: 3

1.1 \Omega
 


Option: 4

0.11 \Omega


Answers (1)

best_answer

Use,\mathrm{i_g=i\frac{s}{G+s}}          .............(1)

but,\mathrm{i_g=10,i=100,s=0.1}

from (1),

\mathrm{10=100\frac{0.1}{G+0.1}}

\mathrm{10G+1=100}

\mathrm{10G+1=9}

\mathrm{G=0.9\Omega}

Hence option 1 is correct.

Posted by

Divya Prakash Singh

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