Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius $R$ with constant speed $v$. The time period of the motion

  • [AIPMT 2007]
  • [AIPMT 2009]
  • A

    depends on both $R$ and $v$

  • B

    is independent of both $R$ and $v$

  • C

    depends on $R$ and not on $v$

  • D

     depends on $v$ and not on $R$ 

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