The diagram shows three arrangements of circular loops, centered on vertical axes and carrying identical currents in the directions indicated. Rank the arrangements according to the magnitudes of the magnetic fields at the midpoints between the loops on the central axes, from least to greatest.
A) 1, 2, 3
B) 2, 1, 3
C) 2, 3, 1
D) 3, 2, 1
E) 3, 1, 2

Question

The diagram shows three arrangements of circular loops, centered on vertical axes and carrying identical currents in the directions indicated. Rank the arrangements according to the magnitudes of the magnetic fields at the midpoints between the loops on the central axes, from least to greatest. 
A) 1, 2, 3 
B) 2, 1, 3 
C) 2, 3, 1 
D) 3, 2, 1 
E) 3, 1, 2

Quizplus · Accepted Answer

The Answer of The diagram shows three arrangements of circular loops, centered on vertical axes and carrying identical currents in the directions indicated. Rank the arrangements according to the magnitudes of the magnetic fields at the midpoints between the loops on the central axes, from least to greatest. 
A) 1, 2, 3 
B) 2, 1, 3 
C) 2, 3, 1 
D) 3, 2, 1 
E) 3, 1, 2

The Diagram Shows Three Arrangements of Circular Loops, Centered on Vertical