Final answer:
Option (c) None of the mentioned is the correct answer because force-sensing resistors, potentiometers, and accelerometers are all analog sensors, which convert physical stimuli into continuous analog signals.
Step-by-step explanation:
The question refers to whether force-sensing resistors, potentiometers, or accelerometers can be considered analog sensors. An analog sensor is a device that converts a physical stimulus into an analog signal, meaning that it can measure changes continuously within a certain range. A potentiometer is a type of analog sensor that measures voltage by comparing an unknown voltage with a known reference voltage. It operates under the principle that the voltage at a point in the middle of a resistive element can be proportional to the position of the contact on the resistor. Current flows through a voltage divider, and the position of the slider determines the output voltage, which can vary linearly with the position and thus represents an analog signal.
On the other hand, both force-sensing resistors and accelerometers are also analog sensors. Force-sensing resistors change their resistance with changes in the force applied to them, allowing them to measure the amount of force in analog form. Similarly, accelerometers measure acceleration forces by detecting changes in capacitive or piezoresistive elements, providing an analog output representative of the measured acceleration. Therefore, the correct answer to which of the following is not an analog sensor is option (c) None of the mentioned, as all of the sensors listed are analog sensors.