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
    A current of 1 mA is flowing through a copper wire.  How many electrons will pass a given point in one second            \[\left[ e=\text{ }1.6\text{ }\times \text{ }{{10}^{19}}Coulomb \right]\]      [RPMT 2000; MP PMT 2002]

    A)             6.25 × \[{{10}^{19}}\]       

    B)            6.25 × \[{{10}^{15}}\]

    C)            6.25 × \[{{10}^{31}}\]

    D)                                      6.25 × \[{{10}^{8}}\]

    Correct Answer: B

    Solution :

                 \[n=\frac{1\times {{10}^{-3}}}{1.6\times {{10}^{-19}}}=6.25\times {{10}^{15}}\].


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