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Question

Two charges +Q and −2Q are located at points A and B on a horizontal line as shown below: The electric field is zero at a point which is located at a finite distance:

A
On the perpendicular bisector of AB.
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B
Left of A on the line
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C
Between A and B on the line
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D
Right of B on the line
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Solution

The correct option is B Left of A on the lineThe electric field is zero at a point where Electric field due to points A and B are opposite in direction and equal in magnitude, which is only possible on the left side of A on the line. On the right of B on the line, fields due to A and B can not be equal and between A and B on the line, fields are in same direction. Therefore, Option 'B' is correct.

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