Generation of Lift is similar to that of drag, the same principle of “no motion no drag” and “no fluid no drag” applies to lift as well, as its generated by the physical contact between solid body and fluid and not by forces caused due to electromagnetic field or magnetic field or any force field in that matter.

On the other hand, Drag, an aerodynamic mechanical force, continuously opposing the aircraft’s motion in air, is generated by each and every part of an aircraft, including the engines. In order to generate drag, a physical contact is necessary between the solid body and a fluid (gas or liquid). Forces like the ones existing in magnetic field or gravitational field cannot help generate drag, as there’s no contact between the solid and fluid.

Factors affecting both lift and drag are in the majority, which means generation of either lift or drag will eventually result in the generation of the other depending on the additional factors required for the same. Drag can be explained in many ways, as aerodynamic friction and aerodynamic resistance (also called form drag).

Friction

Generation of lift forms a component of drag, known as induced drag, which occurs due to the spanwise distorted flow around the wing tips which is also a result of pressure variance from top to bottom of the wing.

All the factors mentioned above, for both lift and drag, can be combined in order to form equations for both quantities, and these equations are called lift equation and drag equation respectively.