Which term describes a device that detects changes in physical conditions such as light, temperature or pressure?

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Prepare for the WJEC Level 1 and 2 Engineering Exam. Explore multiple choice questions, flashcards, and detailed explanations to enhance your understanding. Get exam-ready today!

Multiple Choice

Which term describes a device that detects changes in physical conditions such as light, temperature or pressure?

Explanation:
The main idea is a device that detects changes in physical conditions and turns them into signals for a system to read. That is what a sensor does. It acts as a transducer, converting environmental factors like light, temperature, or pressure into an electrical signal that a controller or readout can use. This is different from an input (any data fed into a system), an output (data produced by a system), or testing (the process of checking something’s performance). So the best term for a device that detects such changes is a sensor.

The main idea is a device that detects changes in physical conditions and turns them into signals for a system to read. That is what a sensor does. It acts as a transducer, converting environmental factors like light, temperature, or pressure into an electrical signal that a controller or readout can use. This is different from an input (any data fed into a system), an output (data produced by a system), or testing (the process of checking something’s performance). So the best term for a device that detects such changes is a sensor.

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