Where Is the Mistake in My Magnetic Field Logic?

[krot]

http://i25.tinypic.com/34s2flh.gif

they say that the magnetic field is paralel
to the plane
so cross product is 0 (sin 0 =0)

where is the mistake in my logic

 

[Doc Al]

they say that the magnetic field is paralel
to the plane

Right.

so cross product is 0 (sin 0 =0)

What's the direction of the magnetic moment?

 

[krot]

from the solution i see that the magnetic moment is a scalar
it doesn't have a direction

i know it should have a direction

where is my mistake
?

 

[Doc Al]

from the solution i see that the magnetic moment is a scalar
it doesn't have a direction

This is incorrect. See: http://hyperphysics.phy-astr.gsu.edu/Hbase/magnetic/magmom.html"

 

[krot]

ok so i go by the right hand rule as the current flows
to determine the direction of moment dipole

 

[Doc Al]

ok so i go by the right hand rule as the current flows
to determine the direction of moment dipole

Yes.