, where k is Coulomb constant and r is the separation between q1 and q2.
Let's visualize this problem in a diagram:
Let the forces be acting on the charge at position 4.
F3 = - kQ2/L2
The x-component of the electric force on charge 4 due to charge 2 is given by:
Four identical charges Q are placed at the corners of a square of side L.
Find the magnitude total force exerted on one charge by the other three charges.
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