JEE Main202427 Jan 2024Evening ShiftPhysicsExperimental PhysicsActual
Given below are two statements: one is labelled as Assertion(A) and the other is labelled as Reason (R). Assertion (A) : In Vernier calliper if positive zero error exists, then while taking measurements, the reading taken will be more than the actual reading. Reason (R) : The zero error in Vernier Calliper might have happened due to manufacturing defect or due to rough handling. In the light of the above statements,
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Step-by-step solution
If a positive zero error exists in a vernier callipers, it means that the instrument shows a reading greater than zero even when the jaws are closed and there is no object being measured. In such a case, when actual measurements are taken, the readings will be more than the actual values. The zero error in Vernier callipers can indeed occur due to manufacturing defects or rough handling. Manufacturing defects may lead to misalignments or inaccuracies in the instrument, while rough handling can result in damage that