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

  • question_answer
    Four wires each of length 2.0 metres are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct                    [MP PET 1995; DPMT 1999]

    A)            Couple on loop P will be the highest

    B)            Couple on loop Q will be the highest

    C)            Couple on loop R will be the highest

    D)            Couple on loop S will be the highest

    Correct Answer: D

    Solution :

               Couple of force on loop S will be maximum because for same perimeter the area of loop will be maximum and magnetic moment of loop \[=i\times A.\] So, it will also be maximum for loop S.


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