Physics · Units, Dimensions & Error Analysis
JEE Main 2024 — 27 January, Shift 2 — Question 40
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, choose the correct answer from the options given below
- Option A:
Both (A) and (R) are correct and (R) is the correct explanation of
- Option B:Correct
Both (A) and (R) are correct but (R) is not the correct explanation of
- Option C:
(A) is true but (R) is false
- Option D:
(A) is false but (R) is true
Answer: B
Step-by-step solution
Assertion is true because a positive zero error increases the observed reading. Reason is true but it only states the cause of zero error, not how its sign affects the measurement, so it does not explain the assertion.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2024
- Paper
- 27 January, Shift 2
- Subject
- Physics
- Chapter
- Units, Dimensions & Error Analysis
- Topic
- Vernier Calipers and Screw Gauge