Air Core conductors have an advantage over conventional ferromagnetic core inductors that the inductance of the air core conductor does not depend upon the value of current it carries and also eliminates the iron losses from magnetic cores. They can also work at higher frequencies than normal due to lower losses and distortion. However the inductance for a coil is low since there is no magnification because of the core so a larger coil needs to be built to achieve a given inductance level. For this purpose they are widely used in high frequency applications where low inductance is required.