Question: A metal bar is pulled through a region in which the magnetic field is perpendicular to the plane of motion (Fig. P21.23). An emf is

A metal bar is pulled through a region in which the magnetic field is perpendicular to the plane of motion (Fig. P21.23). An emf is induced across the bar, with the top of the bar positive relative to the bottom. Determine the direction of B(vector).

Figure P21.23

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