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Two charged Particles having positive charge Q and q are seperated by a distance r. where Q = 9q.
a) At what distance from charge q the net electric field will be zero? (Hint: express in terms of r)
b) If one of these two charge is negative will there be any point between the charges on the line joining them where the net electric field is zero? Explain why. (Hint: For instance consider charge +q is replaced by a charge -q)
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