JEE Main & Advanced JEE Main Solved Paper-2015

  • question_answer
    A rectangular loop of sides 10 cm and 5 cm carrying a current I of 12A is placed in different orientations as shown in the figures below : [JEE Main Solved Paper-2015 ]
     A
     B
     C  
     D  
    If there is a uniform magnetic field of 0.3 T in the positive z direction, in which orientations the loop would be in (i) stable equilibrium and (ii) unstable eqilibrium?

    A) (b) and (d), respectively

    B) (b) and (c), respectively

    C)  (a) and (b) , respectively

    D) (a) and (c), respectively

    Correct Answer: A

    Solution :

    is in stable equilibrium because \[i\vec{A}\] and \[\vec{B}\]are in same direction is in unstable equilibrium \[i\vec{A}\]and \[\vec{B}\] are opposite in direction


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