A galvanometer coil of resistance $50 \,\Omega$, show full deflection of $100\,\mu A$. The shunt resistance to be added to the galvanometer, to work as an ammeter of range $10\, mA$ is
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(d) $S = \left( {\frac{{{i_g}}}{{i - {i_g}}}} \right)\, \times G$$ = \frac{{100 \times {{10}^{ - 6}}}}{{(10 \times {{10}^{ - 3}} - 100 \times {{10}^{ - 6}})}} \times 50 \times 0.5\,\Omega $ (in parallel)
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