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AMU Medical AMU Solved Paper-2011

  • question_answer
    A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad /s about an axis normal to the rod passing through its one end. A constant and uniform magnetic field of 0.5 T parallel to the axis exists everywhere. The emf developed across the ends of the rod is

    A)  50 V                                     

    B)  100 V

    C)  150 V                                   

    D)  zero

    Correct Answer: B

    Solution :

                     The emf developed across the ends of the rod                 \[e=\frac{1}{2}B{{l}^{2}}\omega \]                 \[=\frac{1}{2}\times 0.5\times {{(1)}^{2}}\times 400\]                                 = 100 V


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