A Square,clamping Ammeter Has Four Sides Each with a Length

Multiple Choice

A square,clamping ammeter has four sides each with a length of 3.0 cm.The four sides of the ammeter are capable of measuring the magnetic field at the position of the sides.When the ammeter is clamped around a cylindrical wire carrying a DC current as shown in the figure,the average magnetic field measured in the sides of the clamp is 2.0

A) 0.14 A
B) 0.30 A
C) 0.57 A
D) 5.0 A
E) 19 A