MHT CET 2024 Physics question
When a resistance 200 is connected in series with a galvanometer of resistance 'G', its range is 'V'. To triple its range, a resistance of 2000 is connected in series. The value of 'G' is
Answer: (D)
Solution
A galvanometer with full-scale current and a series resistance measures a maximum voltage . First case: . Second case (range tripled): . Dividing the two equations: \dfrac{G + 2000}{G + 200}$ ⇒ 3G + 600 = G + 2000
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