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posted by  artycat27 on 11/6/2009 5:12:33 PM  |  status: Live  |  Earned Karma: 28

magnetic moment

Course Textbook Chapter Problem Needs by
N/A N/A N/A N/A 11/8/2009 at 8:00:00 AM
Question Details:

A small circular coil of 30 turns of wire lies in

a uniform magnetic field of 0.7 T, so that the

normal to the plane of the coil makes an angle

of 20? with the direction of ->B . The radius of

the coil is 6 cm, and it carries a current of 1 A.

What is magnitude of the magnetic mo-

ment of the coil?

Answer in units of A · m2.

What is the magnitude of the torque exerted

on the coil?

Answer in units of N · m.
Tags: Physics
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posted by Kevin_08 on 11/6/2009 8:04:08 PM  |  status: Live
Asker's Rating: Helpful   
Response Details:
  The magnitude of the magnetic moment is
           μ  = NIA
              = (30)(1A)(π(0.03m)2)

  The magnitude of  the torque exerted is
               τ = NIAB sinθ
  Here θ =20o
         B = 0.70 T
 
Substitute the values.
I hope this helps! Best of luck with the rest of your coursework.
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