A microammeter has a resistance of $100\,\Omega $ and full scale range of $50\,\mu A$. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination
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(b) To convert a galvanometer into an ammeter, a shunt $S = \frac{{{I_g}}}{{I - {I_g}}}G$ is connected in parallel with it. To convert a galvanometer into a voltmeter, a resistance $R = \frac{V}{{{I_g}}} - G$ is connected in series with it.
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