The wire shown in is bent in the shape of a tent, with `theta = 60.0^(@)` and `L = 1.50 m`, and placed in a uniform magnetic field of magnitude `0.300 T` perpendicular to the tabletop. The wire is rigid but hinged at points `a and b`. If the tent is flattened out on the table in `0.100 s`, what is the average induced emf in the wire during this time?

Explanation

`e_(av) = (Delta phi)/(Delta t) = (B("chang e i n area"))/(Deltat) = (0.3[2((sqrt3)/(4)l^(2))])/(0.10) = 5.84 V`