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12th Class Physics Magnetism Question Bank Case Based (MCQs) - Moving Charges and Magnetism

  • question_answer
    If this electron of charge (e) is moving parallel to uniform magnetic field with constant velocity v. the force acting on the electron is:

    A) Bev

    B) \[\frac{Be}{v}\]

    C) \[\frac{B}{ev}\]                        

    D) zero

    Correct Answer: D

    Solution :

    (d) zero The force on electron \[F=qv\,B\,\sin \,\theta \] As the electron is moving parallel to B                  So,       \[\theta =0{}^\circ \] \[\Rightarrow qvB\sin \theta =0\]


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