Physics · Units, Dimensions & Error Analysis
JEE Main 2026 — 5 April, Morning Shift — Question 1
In a Vernier calipers, when both jaws touch each other, zero of the Vernier scale is shifted to the right of zero of the main scale and 7th Vernier division coincides with a main scale reading. If the value of 1 main scale division is 1 mm and there are 10 Vernier scale divisions, then the Vernier caliper has
- Option A:
0.07 cm negative zero error
- Option B:
0.7 cm negative zero error
- Option C:Correct
0.07 cm positive zero error
- Option D:
0.7 cm positive zero error
Answer: C
Step-by-step solution
Scale reading = main scale + Least count × V.S.R. = 0 + 1 × (7/10) = 0.7 mm = 0.07 cm. Since zero of Vernier is to the right of main scale zero, error is positive.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2026
- Subject
- Physics
- Chapter
- Units, Dimensions & Error Analysis
- Topic
- Vernier Calipers and Screw Gauge