6. The electrostatic force on a small sphere of charge 0.4 microcoulomb due to another small sphere of charge -08 microcoulomb in air is 0.2 Newton what is the distance between the two spheres what is the force on the second Sphere reaches the first.
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The distance between the two spheres is 0.12 m.
Equal and Opposite Force acts on the other sphere (By newton's Third Law). Hence 0.2 N attractive