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# Compute Induced Electric Field

### Ligong Han (view profile)

08 Jul 2013 (Updated )

Calculate the induced electric field using the integral expression.

File Information
Description

The calculation of the induced electric field is based on an integral expression. Thus, the distribution of electric field induced by changing magnetic field distributed within an arbitrary polygon can be obtained.
Examples:
% define a L-shaped polygon
L_shapled_polygon = [2,2;8,2;8,5;4.9,4.9;5,8;2,8];
px = L_shapled_polygon(:,1);
py = L_shapled_polygon(:,2);
% compute the induced electric field
[x,y] = meshgrid(0:0.5:10);
[Ex,Ey] = CurlPoly([px,py],x,y);
E = sqrt(Ex.^2+Ey.^2);
figure
surfc(x,y,E)
figure
hold on
quiver(x,y,-Ex,-Ey)
contour(x,y,E,20)
plot([px;px(1)],[py;py(1)],'r')

Required Products Partial Differential Equation Toolbox
MATLAB
MATLAB release MATLAB 7.12 (R2011a)
MATLAB Search Path
```/
/Compute Induced Electric Field
/Compute Induced Electric Field/polygon```