Homework Help: Biot-Savart Law

1. Dec 28, 2006

ermines

i personally think that this is just a very simple problem since the problem only requires plugging the right values into the formula. i'm just having trouble with one minor detail.

1. The problem statement, all variables and given/known data

For the current element Idx(ax+ay) A situated at P(1,-2,2), find the magnetic flux densities at P(2,-1,3).

2. Relevant equations

Biot-Savart

dB = (K)(IdI x r)/rr

3. The attempt at a solution

my only problem in here is that i'm having a hard time figuring out what idx is? do i just substitute it for Idl then just get its cross product with r and so on? also, do i need to actually integrate it to get B?

that is all and thanks.

2. Dec 29, 2006

marlon

What is Idx(ax+ay) ?
What kind of current element do we have here ? Wire, infinite wire, semi infinite wire ?

marlon

3. Dec 29, 2006

ermines

hmmm...never thought of that question, marlon...

i suppose that it is an infinite wire? or can't it just be just a point with such property? will it actually make a difference?