Physics

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Two point charges of magnitudes -6.25 nano coulomb and -12.5 nano coulomb are separated by 25.0 cm There is a point A between the line joining the two charges at a distance 10.0 cm from the charge -12.5 nano coulomb.Find the magnitude of the net electric field these charges produce at point A . Find the direction of the net electric field these charges produce at point A . What would be the magnitude of the electric force this combination of charges would produce on a proton at A? What would be the direction of the electric force this combination of charges would produce on a proton at A ?
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