Which component of an electronic governor uses the movement of a magnetic field to induce voltage?

The magnetic pickup is the component of an electronic governor that uses the movement of a magnetic field to induce voltage. This device operates based on electromagnetic induction principles, where a magnetic field created by the movement of a rotor or similar component passes over a coil. When this happens, it induces an electrical voltage in the coil due to the varying magnetic field. This induced voltage is crucial as it feeds signals to the electronic control unit, allowing the governor to measure the speed of the engine and make real-time adjustments to maintain optimal operating conditions.

In contrast, the electronic control unit processes information and controls the governor's functions but does not specifically induce voltage. The voltage regulator manages and stabilizes voltage levels within the system, ensuring consistent performance but again does not involve the induction process. The rotational sensor provides feedback on speed but does not directly create voltage from magnetic fields. Thus, the magnetic pickup is the correct answer as it directly relies on the principles of electromagnetic induction to fulfill its purpose in the electronic governor system.