A galvanometer with a resistance of $12 \,\Omega$ gives full scale deflection when a current of $3\, mA$ is passed. It is required to convert it into a voltmeter which can read up to $18\, V$. the resistance to be connected is ............... $\Omega $
Medium
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(b) $R = \frac{V}{{{i_g}}} - G = \frac{{18}}{{3 \times {{10}^{ - 3}}}} - 12 = 5988\,\Omega $
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