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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Self Evaluation Test - Current Electricity

  • question_answer
    A conductor carries a current of \[50\mu A.\] If the area of cross-section of the conductor is \[50m{{m}^{2}}\], then value of the current density in \[A{{m}^{-2}}\]is

    A) 0.5

    B) 1

    C) \[{{10}^{-3}}\]           

    D) \[{{10}^{-6}}\]

    Correct Answer: B

    Solution :

    [b] Current density J= I/A \[=50\times {{16}^{-6}}/50\times {{10}^{-6}}=1A{{m}^{-2}}\]


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