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Q. Two long, straight wires lie in the x-y plane and are parallel to the x direction as shown in the figure below. The wires are both a distance of 2.6 m from the origin, and each wire carries a current of 32 A in the +x direction. Find the magnitude of the magnetic field at the point x = 0, y = 0.7 m, z = 0.

Q. A pulley system has an efficiency of 79.5 percent. How much of the rope must be pulled in if a force of 625 N is is needed to lfit a 75 kg desk 2.13 m ? (Disregard Friction)

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