The figure shows three situations when an electron moves with velocity $\vec v$ travels through a uniform magnetic field $\vec B$. In each case, what is the direction of magnetic force on the electron

824-581

  • A

    $+ve\,\,z-$ axis, $-ve\,\,x-$ axis, $+ve\,\,y-$ axis

  • B

    $-ve\,\,z-$ axis, $-ve\,\,x-$ axis and zero

  • C

    $+ve\,\,z-$ axis, $+\,ve\,\,x-$ axis and zero

  • D

    $-ve\,\,z-$ axis, $+ve\,\,x-$ axis and zero

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