MCQ
One centimeter on a scale is divided into $20$ equal divisions. The least count (minimum value) of this scale is
- A$20\ cm$
- B$1\ mm$
- ✓$0.1\ mm$
- D$0.5\ mm$
✓
Answer
Correct option: C.
$0.1\ mm$
As $20$ divisions $= 1\ cm$
$\therefore 1$ division
$=\frac{1}{2}\text{cm}=0.05\text{cm}$
$= 0.5mm$
Hence, least count of this scale $= 0.5mm$
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