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JCECE Engineering JCECE Engineering Solved Paper-2005

  • question_answer
    Total angular momentum of a rotating body remains constant, if the net torque acting on the body is:

    A)  zero                                     

    B)  maximum

    C)  minimum                           

    D)  unity

    Correct Answer: A

    Solution :

    From Saw of conservation of angular momentum, when no external torque acts on a rotating body, then the total angular momentum of die body remains constant. That is,if\[\tau =\frac{dJ}{dt}=0\]\[\Rightarrow \]      \[J=I\omega =\]constant where \[I\] is moment of inertia and a is angular velocity.


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