A circular loop is kept in that vertical plane which contains the north- south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop.

Options

A. towards east and `A`and at `B` upwards
B. towards west and `A`and towards eats at `B`
C. towards east at both `A` and `B`
D. towards west at both `A` and `B`

Answer

D

Explanation

From `A` current is clockwise, magnetic field is away from observer i.e., towards west.
From `B`, current is anti-clockwise, magnetic field is towards observer i.e., towards west.