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28.1 Direct Sensing - Sensing Devices - CIE A Level Physics
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Explanation of CIE A Level Physics Syllabus Points 28.1 Direct Sensing - Sensing Devices.
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28. Nuclear Physics
28.1 Sensing Devices
Candidates should be able to:
(a) show an understanding that an electronic sensor consists of a sensing
device and a circuit that provides an output voltage
(b) show an understanding of the change in resistance with light intensity of
a light-dependent resistor (LDR)
(c) sketch the temperature characteristic of a negative temperature coefficient
(d) show an understanding of the action of a piezo-electric transducer and its
application in a simple microphone
(e) describe the structure of a metal-wire strain gauge
(f) relate extension of a strain gauge to change in resistance of the gauge
(g) show an understanding that the output from sensing devices can be
registered as a voltage
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