Key relationship
Least count=scale span/number of divisions.
Physics · Practical apparatus
Paper scale least count
Choose the scale span and number of equal divisions before reading an object. Smaller divisions improve resolution only when the marks can be distinguished.
Open the interactive experiment →Paper scale least count
அளவுகோலின் நீளம் பிரிவுகளின் எண்ணிக்கையால் வகுக்கப்பட்டால் சிற்றளவு கிடைக்கும். படிக்கக்கூடிய குறியீடுகள் தேவை.
Key notes, relationships and model limits
Practical tip
Choose the scale span and number of equal divisions before reading an object. Smaller divisions improve resolution only when the marks can be distinguished.
Common trap
Count intervals, not marks, when calculating the least count of a paper scale.
Model limits
ideal construction and reading of equal paper divisions; printing width, parallax and irregular marking are excluded.
What you will learn
Adjust paper scale least count apparatus, observe its reading and derive the indicated physical quantity.
Try the experiment
Try both scenarios, change one control, and predict the result before checking the graph and readouts.
Think of it this way
Change one input while keeping the others fixed, as you would in a controlled experiment.
Worked example
An object of 6.34 cm reads 6.3 cm on a 0.1 cm scale, with ±0.05 cm rounding bound.
Why this matters
The model connects paper scale least count with an observable reading. Check the equation and assumptions before applying it.
Before you start
SI units · algebra · graph reading
Check your understanding
A 10 cm span divided into 100 equal parts has least count?
- 1 cm.
- 0.1 cm or 1 mm.
- 0.01 cm.
Read the explanation
0.1 cm or 1 mm.
Course connection: Virtual apparatus preparation. Check exact board/exam membership in the syllabus sources. Physical practical work remains necessary.