NEET Physics Screw Gauge Assertion Reason Question
Assertion (A): Backlash error in a screw gauge can affect the accuracy of diameter measurements. | Reason (R): The thread on the screw and the nut in a screw gauge should tightly fit with each other to avoid backlash.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true but (R) is false.
(A) is false but (R) is true.
Correct Answer
Detailed Explanation
Backlash error occurs when there is 'play' between the screw and nut threads, affecting measurement accuracy. A tight fit between threads helps prevent this error.
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