Two current loops are coaxial and coplanar. One has radius a and the other has radius 2a. Current 2I in the outer loop is antiparallel to current I in the inner loop. The magnitude of the magnetic field at the center of the two loops is
A) 0.
B) .
C) .
D) .
E) .

Question

Two current loops are coaxial and coplanar. One has radius a and the other has radius 2a. Current 2I in the outer loop is antiparallel to current I in the inner loop. The magnitude of the magnetic field at the center of the two loops is
A) 0. 
B) . 
C) . 
D) . 
E) .

Quizplus · Accepted Answer

The Answer of Two current loops are coaxial and coplanar. One has radius a and the other has radius 2a. Current 2I in the outer loop is antiparallel to current I in the inner loop. The magnitude of the magnetic field at the center of the two loops is
A) 0. 
B) . 
C) . 
D) . 
E) .

Two Current Loops Are Coaxial and Coplanar