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Two point charges q and-q are placed at ...

Two point charges q and-q are placed at a distance 2a part. Calculate the electric field at a point P situated at a distance r along the axial line of an electric dipole. What is the electric field when `r>>a`? Also, give the direction of elctric field w.r.t. electric dipole.

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Direction of electric field is along the electric dipole moment.
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