JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Critical Thinking

  • question_answer
    A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance l and h are shown there. After some time the coin falls into the water. Then [IIT-JEE (Screening) 2002]

    A)             l decreases and h increases

    B)             l increases and h decreases

    C)             Both l and h increase         

    D)             Both l  and h decrease

    Correct Answer: D

    Solution :

                As the block moves up with the fall of coin, l decreases, similarly h will also decrease because when the coin is in water, it displaces water equal to its own volume only.


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