When both jaws of vernier callipers touch each other, zero mark of the vernier scale is right to zero mark of main scale, 
mark on vernier scale coincides with certain mark on the main scale. While measuring the length of a cylinder, observer observes 15 divisions on main scale and 
division of vernier scale coincides with a main scale division. Measured length of cylinder is 
mm. (Least count of Vernier calliper 
)
Text Solution
Verified by ExpertsC
Given Least Count 
.
When jaws touch, the zero of the vernier scale is to the right of the main scale zero, indicating a positive zero error.
Zero error 
, where 
is the coinciding vernier division.
.
While measuring the cylinder:
Main Scale Reading 
divisions.
Assuming 
(standard for 
), 
.
Vernier Scale Reading 
.
Observed Reading 
.
True Measured Length = Observed Reading - Zero Error
True Length 
.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems