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CMC Medical CMC-Medical Ludhiana Solved Paper-2013

  • question_answer
    An electron (charge\[=1.6\times {{10}^{-19}}C\]) is meaning in a circle of radius \[5.1\times {{10}^{-11}}m\] at a frequency of \[6.8\times {{10}^{15}}\] revolution/s. The equivalent current is approximately

    A)  \[5.1\times {{10}^{-3}}A\]                          

    B)  \[6.8\times {{10}^{-3}}A\]

    C)  \[1.1\times {{10}^{-3}}A\]                          

    D)  \[2.2\times {{10}^{-3}}A\]

    Correct Answer: C

    Solution :

                    Charge \[Q=it\] \[ne=it\] \[i=\frac{ne}{t}\] \[=\frac{6.8\times {{10}^{15}}\times 1.6\times {{10}^{-19}}}{1}\] \[=1.08\times {{10}^{-3}}A\] \[=1.1\times {{10}^{-3}}A\]


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