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JCECE Engineering JCECE Engineering Solved Paper-2006

  • question_answer
    A positively charged particle moving with velocity \[v\] enters a region of space having a uniform magnetic field \[B\]. The particle will experience the large deflecting force, when the angle between \[v\] and \[B\] is:

    A) \[{{0}^{o}}\]                                      

    B) \[{{45}^{o}}\]

    C)  \[{{90}^{o}}\]                                   

    D)  \[{{180}^{o}}\]

    Correct Answer: C

    Solution :

    Key Idea: Maximum force is experienced when angle between \[v\] and \[B\] is\[{{90}^{o}}\]. Force experienced by a particle of change \[q\], travelling with velocity \[v\] in magnetic field \[B\] is given by                 \[F=qvB\sin \theta \] where \[\theta \] is angle between \[v\] and \[B\] \[\therefore \]  \[{{F}_{m}}=qvB\sin {{90}^{o}}=qvB\]


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