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Q. Two stiff parallel wires a distance d apart in a horizontal plane act as rails to support a light metal rod of mass m (perpendicular to each rail). A magnetic field directed vertically upward, acts throughout. Suppose the rod has mass and length 22 cm and the current through it is If the coefficient of static friction is determine the minimum magnetic field (not necessarily vertical) that will just cause the rod to slide. Give the magnitude of and its direction relative to the vertical (out of the page towards us). [Hint: you are changing the angle of the magnetic field with respect to the vertical]

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