JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2014

  • question_answer
    An electron moving with velocity \[\left( \frac{e}{m} \right)\] describes a circle in a magnetic field of strength\[\text{1}.\text{76}\times \text{1}{{0}^{\text{11}}}\text{C}/\text{kg}\]. If \[2B\]of electron is\[\frac{B}{4}\], then the diameter of the circle is nearly

    A) 1.1 cm  

    B) 1.1 mm

    C) 1.1 m                    

    D) 11 cm

    Correct Answer: A

    Solution :

                    \[\text{1}{{0}^{-\text{2}}}\] \[\text{1}{{0}^{-3}}\] \[1\mu V\] The diameter of the circle \[\text{1}.\text{96}\times \text{1}{{0}^{-\text{8}}}\text{ m}/\text{s}\] \[\text{2}.\text{12}\times \text{1}{{0}^{\text{8}}}\text{ m}/\text{s}\]                


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