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BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    Under a constant torque, the angular momentum of a body changes from A to 4 A in 4 s. The torque is

    A)  3 A        

    B)        \[\frac{1}{4}A\]                

    C)        \[\frac{3}{4}A\]                

    D)         \[\frac{4}{3}A\]

    Correct Answer: C

    Solution :

    Change in angular momentum \[\text{=}\,\text{Torque}\,\text{ }\!\!\times\!\!\text{  time}\] \[\Rightarrow \]               \[\text{Torque}=\frac{4A-A}{4}=\frac{3}{4}A\]


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