If current flows in clock wise direction in coil then that face becomes south pole and if current flows in Anticlock wise direction then the face of coil behaves as N pole"

Magnetic Field Lines of a Circular Coil Carrying Current

To understand the magnetic field lines of a circular coil carrying current, we need to consider the right-hand rule and the principles of electromagnetism.

Right-Hand Rule:
The right-hand rule states that if you point your thumb in the direction of the current, the curling of your fingers represents the direction of the magnetic field lines around the wire.

Magnetic Field Around a Current-Carrying Wire:
When a current flows through a wire, it creates a magnetic field around the wire. The magnetic field lines form concentric circles around the wire, with the wire passing through the center of these circles. The direction of the magnetic field lines is determined by the right-hand rule.

Magnetic Field Inside and Outside the Coil:
When a current flows through a circular coil, the magnetic field lines inside the coil are concentrated within the coil itself. These field lines are parallel to each other and pass through the center of the coil. The direction of the magnetic field lines inside the coil is determined by the right-hand rule.

North and South Poles of the Coil:
To determine the north and south poles of the coil, we need to consider the direction of the magnetic field lines. According to the right-hand rule, if we curl our fingers in the direction of the current flowing through the coil, our thumb will point in the direction of the magnetic field lines inside the coil.

Using the Right-Hand Rule:
- If the current flows clockwise when viewed from the top, the magnetic field lines inside the coil will be in the counterclockwise direction.
- If the current flows counterclockwise when viewed from the top, the magnetic field lines inside the coil will be in the clockwise direction.

Determining the North and South Poles:
- The face of the coil where the magnetic field lines exit the coil is considered the north pole.
- The face of the coil where the magnetic field lines enter the coil is considered the south pole.

Reasoning:
Based on the right-hand rule, we can conclude that the face of the coil where the magnetic field lines exit the coil is the north pole. This is because the direction of the magnetic field lines inside the coil is determined by the direction of the current, and the magnetic field lines form concentric circles around the wire.

Therefore, the face of the coil where the magnetic field lines enter the coil is the south pole.

Summary:
The circular coil carrying current has magnetic field lines that form concentric circles around the wire. The north pole of the coil is the face where the magnetic field lines exit, and the south pole is the face where the magnetic field lines enter. The direction of the magnetic field lines is determined by the right-hand rule, with the direction of the current flowing through the coil.