In this problem, we are required to calculate and add electric fields.
A point charge is placed at each comer of a square with side length a. The charges all have the same magnitude q. Two of the charges are positive and two are negative, as shown in the following figure.
What is the direction of the net electric field at the center of the square?
a) leftward direction
b) upward direction
c) rightward direction
d) downward direction
What is the magnitude of the net electric field at the center of the square due to the four charges in terms of q and a?
Express your answer in terms of the variables q, a, and appropriate constants.
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Electric Field concept. You can view video lessons to learn Electric Field. Or if you need more Electric Field practice, you can also practice Electric Field practice problems.