JEE Main & Advanced Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank Biot-savart's Law and Amperes Law

  • question_answer
    A long solenoid has n turns per meter and current I A is flowing through it. The magnetic field at the ends of the solenoid is                                             [MP PMT 2001; MP PET 2002]                                             

    A)            \[\frac{{{\mu }_{0}}nI}{2}\]   

    B)            \[{{\mu }_{0}}nI\]

    C)            Zero                                         

    D)            \[2{{\mu }_{0}}nI\]

    Correct Answer: A

    Solution :

               B at ends of solenoid is \[\frac{{{\mu }_{0}}}{2}ni\]


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