two point charge 4cul and 1cul are at a part. where should be a third point charge q be placed between them such that the entire system be in equilibrium
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don't know yarrr, sorry
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here is your answer
The charge in side a space containing your points (by which I take you mean charges) is 5q. The the electric field at a point between the points
E= 5q/D^2–1/(1-D)^2 where they are 1 unit of distance apart and D is the Distance from bigger charge. Solve for D.
This is point of unstable equilibrium. Move the point slightly either way a bit and it will zoom off. If free to move the mid charge will continue to move away.
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