JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Electric Conduction Ohms and Resistance

  • question_answer
    An electron (charge = 1.6 × 10?19 coulomb) is moving in a circle of radius 5.1 × 10?11m at a frequency of 6.8 × 1015 revolutions/sec.  The equivalent current is approximately [MP PET 2000]

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

    B)                                      \[6.8\times {{10}^{-3}}\] amp

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

    D)            \[2.2\times {{10}^{-3}}\] amp

    Correct Answer: C

    Solution :

                 \[i=e\nu =1.6\times {{10}^{-19}}\times 6.8\times {{10}^{15}}=1.1\times {{10}^{-3}}amp.\]


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