Download 28.1 Direct Sensing - Sensing Devices - CIE A Level Physics video

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28.1 Direct Sensing - Sensing Devices - CIE A Level Physics

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  • Description: Explanation of CIE A Level Physics Syllabus Points 28.1 Direct Sensing - Sensing Devices.

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    28. Nuclear Physics
    Content
    28.1 Sensing Devices
    Learning outcomes
    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
    thermistor
    (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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