Two point charges (+Q) and (-2Q) are fixed on the X-axis at positions a and 2a from origin respectiv….

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Two point charges (+Q) and (-2Q) are fixed on the X-axis at positions a and 2a from origin respectively. At what positions on the axis, the resultant electric field is zero

Options :-

1. Only x = √2a

2. Only x = -√2a

3. Only x = ±√2a

4. x = 3a/2 only

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