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Strain Gauge 1.MP4

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Published on Oct 20, 2010

This is the first video in a series showing how strain gauges work. In this video, I show you how to calculate the resistance of a wire and how that resistance rises as the wire is stretched due to a tensile load. I also explain how this allows us to make a strain sensor. Note: at the beginning of the video, I incorrectly write the expression for resistance as rho*A/L. Later, I write it correctly as rho*L/A. The numbers are still correct.

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