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$1\ mm.$
- C$0.1\ mm.$
- ✓$0.5\ mm.$
✓
Answer
Correct option: D.
$0.5\ mm.$
As $20$ divisions $= 1\ cm$.
$\Rightarrow 1 \text{ divisions} =\frac{1}{20}\text{cm}=0.05\text{cm}$
$=0.5\text{mm.}$
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