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Two point charges are separated by a certain distance. Electric field intensity is zero at a point in between the two charges. What can we conclude about the charges ?

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If the intensity of electric field is zero at a point in between two charges, we conclude that the two charges are of the same nature. If the charges are not of the same, nature, the electric field due to the two charges will act in the same direction. Thus the resultant field will not be zero.
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