harmonic perturbation

I have a question about harmonic perturbation

I assigned a 1 A current to a cylinder in mf physics using multi-turn coil and solved it with a 60Hz frequency using frequency domain. If I assign 0.1 A to the harmonic perturbation under this coil, what is this current actually? if this "harmonic perturbation" is a harmonic order, why we can not set the order of harmonic?

if this is not an harmonic order, how can we assign harmonic order {A(60Hz)+B(120Hz)} to a coil in frequency domain study.?

Regards,