The figure shows the orientation of a flat circular loop ...

[luminitza]

The figure shows the orientation of a flat circular loop consisting of 50 closely wrapped turns each carrying a current I. The magnetic field in the region is directed in the positive z direction and has a magnitude of 50 mT. The loop can turn about the y axis. If = 20, R = 0.50 m, and I = 12 A, what is the magnitude of the torque exerted on the loop?
 
 
 
   
  a.
  8.1 N  m
   
  b.
  24 N  m
   
  c.
  22 N  m
   
  d.
  13 N  m
   
  e.
  16 N  m

Question 2

The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a current I. The magnetic field in the region is () mT. The loop can turn about the y axis. If = 30, a = 0.40 m, b = 0.30 m, and I = 8.0 A, what is the magnitude of the torque exerted on the loop?
 
 
 
   
  a.
  2.5 N  m
   
  b.
  1.5 N  m
   
  c.
  3.1 N  m
   
  d.
  2.7 N  m
   
  e.
  0.34 N  m

[Pariscourtney]

Answer to Question 1

a

Answer to Question 2

d