8. A uniform magnetic field is directed perpendicular to the xy-plane. A 4.0-m length of conducting wire is to be formed into a two-dimensional shape and then placed in the xy-plane. Which shape would experience the greatest magnetic flux through it?

A a circle
B a rectangle, its length four times its width
C a square
D a rectangle, its length twice its width

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.