Measurements and Instrumentation

Assertion (A): Strain measurement using strain gauge invariably requires a dummy strain gauge. Reason (R): The resistance of strain gauge depends on temperature.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true R is false

D A is false R is true

ANS:A - Both A and R are true and R is correct explanation of A

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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