13. Draw the pattern of magnetic field lines of a current carrying circular loop. What does the

pattern of field lines inside the circular loop indicate? On what factor does the strength of themagnetic field in a circular coil depends?

Magnetic field due to a circular wire carrying current in anti-clockwise direction.

Magnetic field due to a circular wire carrying current in clockwise direction.

 The strength of the magnetic field at any point near the circular wire depends on the current on the wire and distance of the point from the center of the circular wire.