Magnetic Field's Equation's querry.

[kloong]

Homework Statement

B = (miu0)I / 2(pie)(rho) X an

how do i know the direction of the an? if it is ax, ay or az?

Homework Equations

 

[Doc Al]

Can you restate your question?

The field from a long straight current-carrying wire is given by:

$$B = \frac{\mu_0 I}{2 \pi r}$$

Does your question relate to this?

 

[kloong]

yes indeed. and besides that equation, there's suppose to be a unit vector, right? i was wondering how do i know the direction of the unit vector.

 

[Doc Al]

The direction of the field--and the unit vector--is given by the right hand rule. See: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html#c1"

 

[kloong]

awesome! thanks a lot.

at least something good happened today. haih. i just got robbed.