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  5. Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर

NEET Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर NEET PYQ-Current Electricity Charging Capacitors

  • question_answer
    Across a metallic conductor of non-uniform cross-section, a constant potential difference is applied. The quantity which remain constant along the conductor is                                                                                         [NEET  2015]

    A)  current density   

    B)      current

    C)  drift velocity        

    D)       electric field

    Correct Answer: B

    Solution :

    [b]  As the cross-sectional area of the conductor is non-uniform so current density will be different.
    As         \[I=JA\]                         …(i)
    It is clear from Eq. (i), when area increases the current density decreases so the number of flow of electrons will be same and thus the current will be constant.


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