Three point charges are placed as shown in the figure. If a = 0.4 m and the net electric force on Q₂ is zero, then the value of Quand the work needed to remove the charge Q₂ and place it at infinity are: y+ Q-10μC 2a (20 pc, 4.5 J) (20 μc, 3.38 J) (20 μc, 4.5×10^5 J) none of these (15 μc, 3.5 J) Q3=-5μC - a→>>
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