Potentiometer?
Or variable resistor?
Since it isn't a real "throttle" in the traditional sense of not having a plate that throttles air flow, though I guess there is an argument that "throttle" now means the pedal or lever that makes it go faster (or slower).
Also relevant is that most gasoline powered cars today no longer have a throttle cable between the pedal and the throttle plate, and the throttle is opened electronically. So, the gas pedal is now hooked to a potentiometer that signals the ECM to open or close the throttle, among other things.