wiz-icon
MyQuestionIcon
MyQuestionIcon
5
You visited us 5 times! Enjoying our articles? Unlock Full Access!
Question

While measuring the length of a small rod using a vernier callipers, the difference between the observed length and the true length turned out to be 0.4 mm. When the jaws are made to touch each other, the 3rd division on the vernier scale coincides with a division on the main scale, then the least count of the callipers is:

A
0.00133 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.133 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
1.33 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
0.0133 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 0.0133 cm
Given:
The difference between the observed length and the true length of a rod measured by the vernier callipers, Δl=0.4 mm=0.04 cm
When the jaws touch each other, the 3rd division of the vernier scale coincides with a division on the main scale, i.e p=3.
We know that, true length = observed length - zero error (with sign)
Observed length - true length = zero error (with sign)
Δl= zero error (with sign)
0.04=p×Least count
Least count=0.04p
Least count=0.043=0.0133 cm.

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Vernier Caliper
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon