A point charge +Q fixed in position, as shown in the diagram.Five points near the charge and in the plane of the page are shown.At which point will the magnitude of the electric field be least?

Point A

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Point B

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Point C

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Point D

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Point E

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Solution

The correct option is B Point D
The electric field at a distance r due to point charge Q is $E = k Q / r^{2}$
Here point D is far from the point charge Q so r is more and hence the field E will be least at point D. The correct option is D.

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