A resistance wire strain gauge with a gauge factor = 2 is bonded to a steel structure member subjected to a stress of 100 MN/sq.m. Modulus of elasticity of steel is 200 GN/sq.m. Calculate the percentage change in value of the gauge resistance due to the applied stress.
What will be an ideal response?
Percentage change is 
. It is obvious from this example that a heavy stress results in a small change in resistance. If we use strain gauges with larger gauge factors, larger changes in resistance can be obtained. It is easier for the instrument to detect and measure the change.
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A. baseband B. fiber optic C. infrared D. microwave
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=2, 
=1, 
=2, and 
=3. Find the means and variances of the following quantities.
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