u-d magnet icon,red horseshoe magnet with magnetic power sign

print printu-shaped magnet icon red horseshoe magnetic power sign blue background magnetism magnetize attraction concept vector art u-shaped attract attraction attractive background black concept design education electric electromagnetic element energy equipment ferromagnetic field flat force graphic horseshoe icon iron isolated lightning line magnet magnetic magnetism magnetize metal natural negative north object outline physics polarity pole power science shape sign simple steel symbol technology thin vector waves white