FIGURE 22-8
-A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?
A) zero
B) 0.41 m ∙ N
C) 0.47 m ∙ N
D) 0.52 m ∙ N
E) 0.58 m ∙ N

Question

FIGURE 22-8 
-A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?
A) zero 
B) 0.41 m ∙ N 
C) 0.47 m ∙ N 
D) 0.52 m ∙ N 
E) 0.58 m ∙ N

Quizplus · Accepted Answer

When the plane of the loop is perpendicular to the magnetic field, the angle between the magnetic moment and the magnetic field is 0 degrees, resulting in zero torque.

FIGURE 22-8 -A Circular Loop of Wire of Radius 0.50 M Is