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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1999

  • question_answer
    An electron is moving with velocity\[\vec{v}\]in the direction of magnetic field \[\vec{B}\] then force acting on electron is :

    A)  zero                     

    B)         \[e(\vec{\upsilon }\times \vec{B})\]

    C)  \[e(\vec{B}\times \vec{\upsilon })\]                     

    D)         200 Joule

    Correct Answer: A

    Solution :

    Force on a moving charge\[\text{f}\,\text{=}\,\text{q}\,\text{B}\,\text{sin}\,\] \[\therefore \,\theta =0\,then\,\sin \,\theta =0\] \[\therefore \,F=\theta \]


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