For finding the polarity of the two faces of a current carrying circular coil, the following rule applies:
When an observer, looking at the circular coil, finds the current to be flowing in the anti-clockwise direction, then face of the coil behaves like the N-pole of the equivalent magnet. On the other hand, if the’current is seen to flow in the clockwise direction, then face of the coil behaves like the S-pole of the equivalent magnet.