JEE Main & Advanced Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank Motion of Charged Particle In Magnetic Field

  • question_answer
    A charged particle of mass m and charge q describes circular motion of radius r in a uniform magnetic field of strength B. The frequency of revolution is      [MP PET 1997; RPET 2001]

    A)            \[\frac{Bq}{2\pi m}\]        

    B)            \[\frac{Bq}{2\pi rm}\]

    C)            \[\frac{2\pi m}{Bq}\]        

    D)            \[\frac{Bm}{2\pi q}\]

    Correct Answer: A

    Solution :

                       Time period is given by \[T=\frac{2\pi m}{qB}\] Þ Frequency \[\nu =\frac{1}{T}=\frac{qB}{2\pi m}\]


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