wire loop of radius 12 cm and resistance 8.5 o is located in a uniform magnetic field e that changes in magnitude as given in fig. 30-38. the vertical axis scale is set by b, : 0.50 t, and the horizontal axis scale is set by r, - 6.00 s. the loop's plane is perpendicular to e . what emf is induced in the loop during time intervals (a) 0 to 2.0 s., (b) 2.0 s to 4.0 s., and (c) a.0 s to 6.0 s?