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Manipal Medical Manipal Medical Solved Paper-2011

  • question_answer
    A cubical copper block has each side 2.0 cm. It is suspended by a string and submerged in oil of density\[820\text{ }kg/{{m}^{3}}\]. The tension in the string is (density of copper\[8920\text{ }kg/{{m}^{3}},\text{ }g=10\text{ }m/{{s}^{2}}\])

    A)  0.648 N          

    B)  0.712 N

    C)  0.066 N          

    D)  1.37 N

    Correct Answer: A

    Solution :

     Tension,\[T=mg-\]buoyant force \[=V\rho g-V(\rho -\sigma )g={{l}^{3}}(\rho -\sigma )g\] \[=8\times {{10}^{-6}}(8920-820)\times 10\] \[=0.648\text{ }N\]


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