Two Long Straight Wires Enter a Room Through a Window

Multiple Choice

Two long straight wires enter a room through a window. One carries a current of 3.0 A into the room while the other carries a current of 5.0 A out. The magnitude in T.m of the path integral around the window frame is:

A) 2.5* 10^-6 T .m
B) 3.8 * 10^-6 T . m
C) 6.3 * 10^-6 T .m
D) 1.0 * 10^-5 T .m
E) none of these