(a) Shruti draws magnetic field lines close to the axis of a current carrying circular loop. As she moves away from the centre of circular loop, she observes that the lines keep on diverging. Explain the reason for her observation.
(b) Write two properties of magnetic field lines.

Explanation

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.