Sensors are one type of input device. For each of the following situations, name a different sensor that could be used.
(i) air conditioning in an office building
(ii) maintaining correct growing conditions in a greenhouse
(iii) detecting an intruder in a building

Answer:

(i) temperature/thermistor
(ii) moisture, humidity, light/photodiode, temperature, pH
(iii) sound/acoustic, infrared, pressure, motion, microwave

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