AP Physics C 2017

31 . A loop of wire surrounds a hole in a table, as shown above. A bar magnet is dropped, north end
down, from far above the table through the hole. Let the positive direction of current be defined as
counterclockwise as viewed from above. Which of the following graphs best represents the induced
current I in the loop?

(A)

(B)

(C)

(D)

(E)