Finding the net electric field

AI Thread Summary
To find the net electric field at the center of a square with given corner charges, the electric field produced by each charge must be calculated using E = k*q/r². The calculated electric fields for the charges are Q1: -18000 N/C, Q2: 36000 N/C, Q3: 36000 N/C, and Q4: -18000 N/C. Since electric fields are vectors, their directions must be considered for vector addition at the center of the square. The discussion emphasizes understanding the influence of positive and negative charges on the electric field direction. The next step involves performing vector addition to determine the net electric field at the center.
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Homework Statement



Find the electric field at the center of a square having side = 1m and having the following charges at each corner:

Q1:-1 x 10^-6
Q3: -2 x 10^-6
Q2: 2 x 10^-6
Q4: -1 x 10^-6

(Q1 is upper left corner, Q2 is upper right, q3 is lower left and Q4 is lower right)

Homework Equations



E= k*q/r2

The Attempt at a Solution



I used the equation to found the electric field for each of the charges (Q1: -18000, Q2: 36000, Q3: 36000, Q4: -18000) . But now I don't know what to do :frown:
 
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Those fields are vectors. What are their directions?

ehild
 
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