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IIT JEE 2006 Paper : PHYSICS Section III - Comprehension Passage 1

Each comprehension passage contains 3 questions.
Each question below has only one correct answer.
In the IIT-JEE, you will be awarded 5 marks for each correct answer and −2 for each incorrect answer.
You will be awarded 0 marks for not attempting a question.

A wooden cylindrical block of diameter 4r, height H and density ρ is kept on a hole of diameter 2r in a tank completely filled with a liquid of density 3ρ as shown in the figure.

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Multiple choice

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The level of the liquid is allowed to fall down gradually. If the cylindrical block starts moving up when the level of the liquid is at a height h1 above the top surface of the block, then what is the value of h1?





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