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  4. A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be

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Q. A milli voltmeter of $25$ milli volt range is to be converted into an ammeter of $25$ ampere range. The value (in ohm) of necessary shunt will be

AIPMTAIPMT 2012Moving Charges and Magnetism

Solution:

$S=\frac{V_{g}}{\left(I-I_{g}\right)}$
Neglecting $I_{g}$
$\therefore S=\frac{V_{g}}{I}=\frac{25 \times 10^{-3} V }{25 A }$
$=0.001 \,\Omega$