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MHT CET Physics question

PhysicsExperimental SkillsMHT CET

With resistances P and Q in the left and right gaps of a meter bridge, the balance point divides the wire in the ratio 1/3. When P and Q are increased by , the balance point divides the wire in the ratio 3/5. The value of P and Q will be respectively

Answer: (C)

Solution

P/Q = 1/3 and (P + 40)/(Q + 40) = 3/5 give Q = 3P and 5P + 200 = 3Q + 120, so P =

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Question ID VK-044995