MHT CET Physics question
An unknown resistance is connected in series with a resistance of . This combination is connected to one gap of a metrebridge while a resistance is connected in the other gap. The balance point is at 50 cm. Now, when the resistance is removed the balance point shifts to 40 cm. The value of is (in ohm)
Answer: (C)
Solution
At 50 cm, ; at 40 cm, , so
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