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________________ is used to describe the figure of merit which determines the overall behaviour of the wire under stress.

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________________ is used to describe the figure of merit which determines the overall behaviour of the wire under stress.

(a) gauge resistance

(b) elastic factor

(c) gauge factor

(d) elastic modulus

The question was asked in exam.

I'm obligated to ask this question of Implantable Telemetry Systems in chapter Biomedical Telemetry of Biomedical Instrumentation

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Right choice is (c) gauge factor

The explanation is: Gauge factor gives information on the expected resistance change or output signal at maximum permissible elongation. The gauge factor determines to a large extent the sensitivity of the wire when it is made into a practical strain gauge. The figure of merit which describes the overall behaviour of the wire under stress is determined from the gauge factor of the wire.

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