Find the direction of magnetic field due to a current-carrying circular coil held :
[i] Vertically in north-south plane and an observer looking at it form east sees the current to flow in an anticlockwise direction
[ii] Vertically in east-west plane and an observer looking it from south sees the current to flow in an anticlockwise direction .
[iii] Horizontally and an observer looking at it from below sees current to flow in the clockwise direction.

Explanation

i] The magnetic field is from east to west direction.
ii] The magnetic field is from south to north direction.
iii] The direction of the field for the observer positioned below the coil is downward.