Question 2

A long straight wire with a square cross section carries a

current of 3 A, which is distributed uniformly over the cross section. The side

length of the square cross section is 0.2 m. Suppose we place a square Amperian

loop (AL), with side length 0.1 m, entirely inside the wire, with the plane of

the square AL perpendicular to the wire. Calculate the net current

bounded/encircled by the AL.