JEE Main & Advanced Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank Force and Torque on a Current Carrying Conductor

  • question_answer
    A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5\[weber/{{m}^{2}}\]. The magnetic dipole moment of the coil is                                    [MP PMT 2001]

    A)            0.15 \[ampere-{{m}^{2}}\]    

    B)            0.3 \[ampere-{{m}^{2}}\]

    C)            0.45 \[ampere-{{m}^{2}}\]    

    D)            0.6 \[ampere-{{m}^{2}}\]

    Correct Answer: B

    Solution :

               \[M=NiA=20\times \frac{22}{7}{{(4\times {{10}^{-2}})}^{2}}3=0.3\,A-{{m}^{2}}\]


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