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KVPY Sample Paper KVPY Stream-SX Model Paper-20

  • question_answer
    A positively charged ion is accelerated by using a voltage V and then it is allowed to enter a region of perpendicular magnetic field. Frequency of rotation of ion is x If accelerating voltage is increased four times, then frequency becomes

    A) \[2x\]

    B) \[\frac{x}{2}\]

    C) \[4x\]    

    D) \[x\]

    Correct Answer: D

    Solution :

    Frequency, \[f=\frac{2\pi m}{qB}\] and its independent of accelerating voltage or velocity.


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