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MHT CET Physics question

PhysicsExperimental SkillsMHT CET

Two resistances are connected in the two gaps of a meter bridge. The balance point is 20 cm from the zero end. When a resistance of is connected in series with a smaller of the two resistances, the null point shifts to 40 cm. The smaller of the two resistance has the value

Answer: (B)

Solution

Initially , so , ; after adding to the smaller one,

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Question ID VK-044998