Numerical Example

 
This process repeats itself.  Each voltage cell is recalculated to be the average of its neighboring voltages.  Iteration #2 is shown below:
 

 
Example Calculation:  After the first iteration was completed, the voltage in the center of the square (row 3, column 3) was surrounded by voltages of 25 (north), 0 (east), 0 (south), and 0 (west).  The average of these four values is 6.25 V.  Thus, this entry in the matrix receives a value of 6.25 V for iteration #2.
 
 
 
 
 
 
 
 

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