Discussion :: Measurements and Instrumentation
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Assertion (A): Strain measurement using strain gauge invariably requires a dummy strain gauge.
Reason (R): The resistance of strain gauge depends on temperature.
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A.
Both A and R are true and R is correct explanation of A
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B.
Both A and R are true but R is not correct explanation of A
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C.
A is true R is false
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D.
A is false R is true
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Answer : Option A
Explanation :
The dummy strain gauge compensates the error due to change in temperature because temperature affects both the active and dummy strain gauges equally.
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