Point P lies on the axis of dipole. If the dipole is rotated by 90 about anticlockwise wise direction, the electric field vector E at P will rotate by?

Question

Answer

Rotation of Electric Field Vector at Point P Due to Rotation of Dipole

When a dipole is rotated by 90 degrees about the anticlockwise direction, the electric field vector at point P will also rotate by 90 degrees. This can be explained using the following points:

Dipole and Electric Field Vector at Point P

A dipole consists of two equal and opposite charges separated by a small distance.

When the dipole is placed on the axis passing through its midpoint, the electric field vector at any point on the axis is directed along the axis towards the opposite charge.

At point P, which lies on the axis of the dipole, the electric field vector is directed towards the negative charge.

Rotation of Dipole by 90 degrees

When the dipole is rotated by 90 degrees about the anticlockwise direction, the direction of the electric field vector at point P also changes.

The positive charge of the dipole now lies on the axis passing through P, and the negative charge is perpendicular to the axis.

As a result, the electric field vector at P is now directed perpendicular to the axis of the dipole.

Rotation of Electric Field Vector at Point P

Since the electric field vector at point P is now perpendicular to the axis of the dipole, it will rotate by 90 degrees in the anticlockwise direction.

The new direction of the electric field vector will be perpendicular to the original direction and will be directed towards the positive charge of the dipole.

Conclusion

Therefore, when a dipole is rotated by 90 degrees about the anticlockwise direction, the electric field vector at point P will rotate by 90 degrees in the anticlockwise direction.

The direction of the electric field vector will change from being directed towards the negative charge to being directed towards the positive charge of the dipole.

Answer

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