Exam-style question
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Which sequence correctly describes the use of an analogue temperature sensor with a computer?.
- A.Sensor produces an analogue signal, ADC converts it to digital data, computer processes the data
- B.Sensor produces digital data, DAC converts it to analogue data, computer processes the data
- C.Computer produces an analogue signal, ADC sends it to the sensor, sensor stores the data
- D.DAC converts the sensor's analogue signal to digital data before the computer processes it
Model answer
What a good answer should say
- Sensor produces an analogue signal, ADC converts it to digital data, computer processes the data
Explanation
Why this works
An analogue sensor produces a continuously varying signal. The ADC changes this into digital data, which can then be processed by the computer.
Common mistake
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