A galvanometer with its coil resistance 25 $\Omega $ requires a current of 1 mA for its full deflection. In order to construct an ammeter to read upto a current of 2 A, the approximate value of the shunt resistance should be :
$2.5 \times {10^{ - 3}}\,\Omega $
$1.25 \times {10^{ - 2}}\Omega $
$1.25 \times {10^{ - 3}}\Omega $
$2.5 \times {10^{ - 2}}\Omega $
Solution
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