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The gauge factor of a metallic strain gauge is typically about

  • A.2
  • B.0.5
  • C.50
  • D.200

Answer: A

Around two is the value for the copper nickel and nickel chromium alloys used for bonded foil gauges. A semiconductor gauge reaches a hundred or more through the piezoresistive effect, at the cost of poor linearity and a large temperature coefficient.

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