A rectangular loop PQRS made from a uniform wire has length a width b and mass m It is free to rotate about the arm PQ which

Question

A rectangular loop PQRS made from a uniform wire has length a width b and mass m It is free to rotate about the arm PQ which remains hinged ZA along a horizontal line taken as the Y axis see figure Take the XI vertically upward direction as the Z axis A uniform magnetic field B 3 4k B exists in the region The loop is held in the X Y plane and a current I is passed through it The loop is now released and is found to stay in the horizontal position in equilibrium Then a the direction of current in PQ is form P to Q b magnetic force on arm RS is IBob 3k 4 mg c I 6B b 2mg 7B h d I S P Q R Y

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