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    Physics-
    General
    Easy

    Question

    Figure shows a conducting square loop of side a which is placed in a plane perpendicular to a uniform magnetic field B. Points A and D are connected to a battery which sends a current i. The magnetic force on the loop is

    1. zero    
    2. 2 square root of 2 a i B    
    3. 2 a i B    
    4. square root of 2 a i B    

    The correct answer is: square root of 2 a i B

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