NEET Sample Paper NEET Sample Test Paper-50

  • question_answer When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their-

    A) Energy decreases

    B) Energy increases

    C) Momentum increases

    D) Momentum and energy remain unchanged

    Correct Answer: D

    Solution :

    \[F\bot v\] \[F.v=0\] \[P\,\,=\,\,0\]=0 \[\Delta K\,\,=\,\,0\] \[K\,\,=\,\,constant\]

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