What principle underlies many position-sensing devices such as synchros?

Many position-sensing devices, including synchros, operate based on the principle of electromagnetic induction. This principle refers to the generation of an electromotive force (EMF) across a conductor when it is exposed to a varying magnetic field. In the case of synchros, which are commonly used in applications requiring precise positioning and direction sensing, the electromagnetic induction principles allow for the conversion of mechanical position into an electrical signal.

As the rotor of a synchro turns, it alters the magnetic field within the stator windings. This change induces voltages in the stator coils, which can be used to determine the angle of the rotor. The relationship between the rotor's position and the induced voltage allows accurate position feedback to a control system.

While magnetism is indeed a component of the process, it is the phenomenon of electromagnetic induction that is central to the operation of synchros, making it the most relevant principle in this context. Quantum mechanics and Ohm's Law do not directly pertain to the functional mechanics of position-sensing in synchros, as quantum effects are not typically the basis for macroscopic sensors, and Ohm's Law relates to the behavior of electrical circuits rather than position sensing.