Question
State the formula for determining:
1. pitch
2. least count for a vernier callipers.
1. pitch
2. least count for a vernier callipers.
✓
Answer
(i) $\quad$ Pitch $=\frac{\text { Unit of main scale }}{\text { No. of divisions in the unit }}$
For example: If one centimetre length has ten divisions then
$
\text { Pitch }=\frac{1 cm}{10}=0.1 cm
$
(ii) Least count (L.C.) $=\frac{\text { Pitch }}{\text { No. of vernier scale division }}$
For example: If pitch is 0.1 cm and there are ten vernier scale divisions.
Then L.C. $=\frac{0.1}{10}=0.01 cm$
For example: If one centimetre length has ten divisions then
$
\text { Pitch }=\frac{1 cm}{10}=0.1 cm
$
(ii) Least count (L.C.) $=\frac{\text { Pitch }}{\text { No. of vernier scale division }}$
For example: If pitch is 0.1 cm and there are ten vernier scale divisions.
Then L.C. $=\frac{0.1}{10}=0.01 cm$
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