Magnetic Field of 10cm Square Loop w/ 0.3A Current

[tag16]

Homework Statement

A square loop of wire with a side of 10cm carries a current of 0.3A. What is the
magnetic field in the center of the square loop?

Homework Equations

B= 2($$\sqrt{}$$2)$$\mu$$I/$$\pi$$L

$$\mu$$=IA

The Attempt at a Solution

Not sure if these are the right equations for this problem and if they aren't then I have no idea what to do. If they are then I just need to know what the area would be.

 

[ApexOfDE]

Can you find a magnetic field created by 1 segment of a loop? It is similar to finding a magnetic field caused by long wire with current I.

 

[tag16]

B= $$\mu$$I/ 2$$\pi$$a

Is this right?

 

[ApexOfDE]

sqrt(2), i think.

 

[tag16]

so B= ($$\sqrt{}$$2)$$\mu$$I/2$$\pi$$a ?

 

[ApexOfDE]

It is just a magnitude of field due to 1 segment of a loop. Multiply it with 4. :)

 

[tag16]

ok so that equation times 4. Thanks

 

[tag16]

oh and I'm still not really sure what the area would be, I need it to figure out what $$\mu$$ is.

 

[ApexOfDE]

http://en.wikipedia.org/wiki/Magnetic_constant

Hope this helps.

 

[tag16]

oh yeah, I forgot about that. Thanks again.