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NEET Sample Paper NEET Sample Test Paper-22

  • question_answer
    An electron beam is moving between two parallel plates having electric field \[1.125\times {{10}^{-6}}\,V/m.\] A magnetic field \[3\times {{10}^{-10}}T\] is also applied, so that beam of electrons does not deflect. The velocity of the electron is:

    A)  4225 m/s          

    B)  3750 m/s        

    C)       2750 m/s         

    D)  3200 m/s

    Correct Answer: B

    Solution :

    \[v=\frac{E}{B}\] \[=\frac{11.25\times {{10}^{5}}}{3\times {{10}^{-10}}}=3.75\,\times {{10}^{3}}\] \[=3750\,m/s\] Hence, the correction option is [b].


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