• A current of 1 A flows in the conductors forming a closed circuit with lengths of 30, 40, and 50 cm on each side as shown in the figure. The circuit lies in the table plane and a uniform magnetic field of 0.5 T is applied in the +y direction.
• (a) Find the magnitude and direction of the magnetic force acting on a portion of the circuit consisting of two sides of lengths 30 cm and 40 cm. 
• (b) Find the magnetic moment vector of the current ring.
• (c) Find the torque (vector) acting on the current ring.
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y 40 cm 50 cm I B 30 cm I X