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  • The maximum current in a galvanometer can be 10 mA. It’s resistance is 10. To convert it into an ammeter of

The maximum current in a galvanometer can be 10 mA. It’s resistance is 10\Omega. To convert it into an ammeter of 1 Amp. a resistor should be connected in

Option: 1

 series, 0.1\Omega


Option: 2

parallel, 0.1\Omega


Option: 3

series , 100\Omega


Option: 4

parallel , 100 \Omega


Answers (1)

best_answer

 

Conversion of galvanometer into ammeter -

Connect a low resistance in parallel to the galvanometer

 

Required shunt -

s= \frac{i_{g}G}{(i-i_{g})}

- wherein

i_{g}- Current through galvanometer

 

I_{g}=10mA \Rightarrow G =10 \Omega

and I=1 A

 S (I – IG) = IGG  where S is shunt is parallel   

            S = 0.1\Omega

 

 

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Gunjita

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