MHT CET 2023 Physics question
A galvanometer of resistance 20 gives a deflection of 5 divisions when 1 mA current flows through it. The galvanometer scale has 50 divisions. To convert the galvanometer into a voltmeter of range 25 volt, we should connect a resistance of
Answer: (B)
Solution
Current per division mA, so the full-scale current is mA A. To make a voltmeter, a high resistance is connected in series: , so , giving $20 + R
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