Which of the following phenomenon is commonly used in industry to sense very small changes in the physical dimensions of a load (force) column?

a. The proportionality between liquid level and pressure
b. The attenuation of nuclear radiation by solid materials
c. The variation of resistance of a wire as it is deformed
d. The sensitivity of hair to moisture
e. The principle that, if hydraulic flow-velocity is high, the corresponding pressure will be low, and vice versa


c. The variation of resistance of a wire as it is deformed

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