# Magnetostatics. Calculate the magnetic flux density.

by beyondlight
Tags: density, flux, magnetic, magnetostatics
 P: 45 Problem description: A wery long, than and flat metal plate of width 2a carries the total current I in the z-direction. The current density is uniformely distributed over the metal plate. A point P of particular interest is also shown in the figure, where the point has the position r=ax+ay. Figure: http://tinypic.com/view.php?pic=4htkyt&s=5 Task: Calculate the magnetic flux density at point P. Question: I think the appropriate formula to calculate the flux density is $\int B \cdot dl= \mu I$ But the current is spread over the x-axis, so can i change the metal plate into a easier geometry that has the identical magnetic field, or an easier way to calculate the MFD, so to say?