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 up to a current of $2\,A,$  the approximate value of the shunt resistance should be
  • A$2.5 \times {10^{ - 2}}\,\Omega $
  • B$1.25 \times {10^{ - 3}}\,\Omega $
  • C$2.5 \times {10^{ - 3}}\,\Omega $
  • D$1.25 \times {10^{ - 2}}\,\Omega $
JEE MAIN 2018, Diffcult
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