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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A galvanometer reads 5⋅0V at full scale deflection and is graded according to its resistance per volt at full scale deflection as 5000ΩV−1. (i) How will you convert it into a voltmeter that reads 20V at full scale deflection? (ii) Will it still be graded 5000ΩV−1? (iii) Will you prefer this voltmeter to one that is graded 2000ΩV−1?

A galvanometer reads 5⋅0V at full scale deflection and is graded according to its resistance per volt at full scale deflection as 5000ΩV−1. (i) How will you convert it into a voltmeter that reads 20V at full scale deflection? (ii) Will it still be graded 5000ΩV−1? (iii) Will you prefer this voltmeter to one that is graded 2000ΩV−1?

A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it to extend its range its range to nV volt. In figure