The wire shown in Figure P20.60 is bent in the shape of a “tent” with θ = 60° and L = 1.5 m, and is placed in a uniform magnetic field of 0.30 T directed perpendicular to the tabletop. The wire is “hinged” at points a and b. If the tent is flattened out on the table in 0.10 s, what is the average induced emf in the wire during this time?
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