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Non-Ideal Battery

A galvanomete...

Question

A galvanometer having a coil resistance of 100 $Ω$ gives a full scale deflection, when a current of 1 mA is passed through it. The value of resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10 A, is:

A

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B

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C

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D

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Solution

The correct option is D

$I_{g} = 10^{- 3} A$

$R_{g} = 100 Ω$

R (shunt resistance) $= \frac{I_{g} (R_{g})}{I - I_{g}} = 0.01 Ω$

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