A galvanometer of resistance G is converted into a voltameter of range 0 − 1 V by connecting a resistance R in series with it. The additional resistance that should be connected in series with R 1 t

Question

A galvanometer of resistance G is converted into a voltameter of range 0 − 1 V by connecting a resistance R in series with it. The additional resistance that should be connected in series with R 1 ​ to increase the range of the voltmeter to 0 − 2 V will be :

TestHub · Accepted Answer

i g ​ ( R 1 ​ + G ) = 1 i g ​ ( R 1 ​ + G + R 2 ​ ) = 2 R 1 ​ + G 1 ​ ( R 1 ​ + G + R 2 ​ ) = 2 R 1 ​ + G + R 2 ​ = 2 R 1 ​ + 2 G R 2 ​ = R 1 ​ + G

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