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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 of length L has a mean diameter D. It has n layers of windings of N turns each. If it carries a current ?i? the magnetic field at its centre will be [MP PMT 2000]

    A)    Proportional to D

    B)    Inversely proportional to D

    C)    Independent of D

    D)    Proportional to L

    Correct Answer: C

    Solution :

       Magnetic field due to solenoid is independent of diameter (Because \[B={{\mu }_{0}}ni\]).


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