A: As current flow in the primary it will magnetize the core of the iron in the transformer that is called magnetizing.

i also do know the answer

Magnetizing inrush current has bigger 2nd harmonics compare to short circuit current.

the second harmonics content is about >60% of fundamental harmonic.

magnetizing inrush current happened when we energised the transformer, and short circuit current happened if there is a short circuit between different alive phase.

This phenomenon is referred to as the hysteresisof the material.

Magnetizing is a physical change.