A structural member is compressed to produce a strain of 5 μm/m. The nickel wire strain gauge has a gauge factor of -12.1. The pre-stress resistance of the gauge is 120 Ω. The change in resistance due to compressive strain will

increase the resistance by 49.6 mΩ

increase the resistance by 7.26 mΩ

decrease the resistance by 7.26 mΩ

decrease the resistance by 49.6 mΩ

A structural member is compressed to produce a strain of 5 μm/m. The

1.	A structural member is compressed to produce a strain of 5 μm/m. The nickel wire strain gauge has a gauge factor of -12.1. The pre-stress resistance of the gauge is 120 Ω. The change in resistance due to compressive strain will
A.	increase the resistance by 7.26 mΩ
B.	decrease the resistance by 7.26 mΩ
C.	increase the resistance by 49.6 mΩ
D.	decrease the resistance by 49.6 mΩ
Answer» C. increase the resistance by 49.6 mΩ

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