The pattern of magnetic field due to current carrying circular loop are circular near the current carrying loop but the concentric circles representing magnetic field lines become bigger and bigger. At the centre of the circular loop, the magnetic field lines are straight. Therefore on moving away from the centre of circular loop, magnetic field lines keep on diverging.
(b) Properties of magnetic field lines :
(i) These lines originate from the north pole and end at the south pole.
(ii) Two magnetic field lines do not intersect each other.