Hello I am new to the Physics Forum and recently I am thinking of choosing an engineering major, but I am having some question about the jobs of engineers. My dream is to use the rules and laws of physics to invent and create things that are useful in life (I know it is not easy to really 'invent' something, so I am just wondering who's work is closer to doing things like that...). To me this sounds like close to an engineer's work, but from what I have heard of, engineers' job is not very close to 'inventing'. For example engineers would design the circuits in many household electrical appliance. Although the circuit would be different for every product and every company will have different ones, the basic method and rules they use I guess are the same and are already existing. Or I think sometimes engineers would calculate the right amount of an ingredient needed for a specific product in order to suit its specific purpose, or picking the best material to let it work best and stable in reality. If this is true, I think they do create new things, but this is by putting existing things together in new ways but not inventing new technology or things that isn't there before... So are the following also jobs of engineers? Like using the theory of the motion of electrified conductor in magnetic field to invent motors, or knowing the theory of Resonance and make use of it to invent something new? thanks for answering!