# Magnetic flux

1. Mar 3, 2006

HI,
I have this problem in which I am ask to find the magnetic flux through the square:
this is the picture

I know that I need to use the Gauss law but I just don't know how to use it.
please just give some hints .I feel I can do it!

B

2. Mar 3, 2006

### Galileo

Gauss' law applies to electrostatic field. You can use Ampere's law to find the magnetic field of the wire. Then straightforward integration to find the flux through the square.