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Q.

The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of 90° about its perpendicular axis, the electric field at the same point will be

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a

E

b

E / 4

c

E / 2

d

2E

answer is C.

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Detailed Solution

When the dipole is rotated through at an angle of 90° about it's perpendicular axis then given point comes out to be on equator. So field will become E / 2 at the given point.
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