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
If the current is directed towards north at the topmost point of that circular loop that means, from point A’s perspective, current is in clockwise direction and will cause a magnetic field which is moving inwards i.e. to the west at point A and subsequently to the west at point B.
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