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NEET Sample Paper NEET Sample Test Paper-64

  • question_answer
    In the hydrogen atom, the electron is making\[6.6\,\,\times \,\,{{10}^{15}}r.p.s.\text{ }\]If the radius of the orbit is \[0.53\,\,\times \,\,{{10}^{10}}\,metre\text{ }\] then magnetic field produced  the centre of the orbit is                 

    A) 140 Tesla          

    B) 12.5 Tesla

    C) 1.4 Tesla                      

    D) 0.14 Tesla

    Correct Answer: B

    Solution :

    \[i=qv\] \[B=\,\,\frac{{{\mu }_{0}}i}{2r}\,\,=\,\frac{{{\mu }_{0}}qv}{2r}\] \[=\,\,\,\frac{4\pi \times {{10}^{-7}}\times 1.6\times {{10}^{-19}}\times 6.6\times {{10}^{15}}}{2\times 0.53\times {{10}^{-10}}}\] \[=\,\,\frac{2\pi \times 1.6\times 6.6}{5.3}\,\,\,=\,\,12.518\,\,Tesla\]


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