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

  • question_answer
    An electron (charge q coulomb) enters a magnetic field of H \[weber/{{m}^{2}}\] with a velocity of \[v\,m/s\] in the same direction as that of the field the force on the electron is    [MP PET 2000]

    A)            Hqv Newton?s in the direction of the magnetic field 

    B)            Hqv dynes in the direction of the magnetic field

    C)            Hqv Newton?s at right angles to the direction of the magnetic field

    D)            Zero

    Correct Answer: D

    Solution :

               \[\overrightarrow{F}=q(\overrightarrow{v\,}\times \overrightarrow{B})=0\] as \[\overrightarrow{v\,}\] and \[\overrightarrow{B}\] are parallel.


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