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

  • question_answer
    The field due to a long straight wire carrying a current I is proportional to                                              [MP PMT 1993]

    A)            I     

    B)            \[{{I}^{3}}\]

    C)            \[\sqrt{I}\]                            

    D)            \[1/I\]

    Correct Answer: A

    Solution :

               \[B=\frac{{{\mu }_{0}}}{4\pi }\cdot \frac{2i}{r}\] Þ \[B\propto i\]


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