Class 9 Science | Importance of Least Count

Method

Observe a stopwatch, a short scale and a protractor closely.
Discuss with your friends which physical quantity each of these instruments is used to measure.
Discuss the value of the smallest amount that can be measured with each of these instruments.
Using your discussion, complete the given table.

S.N.	Name of instrument	Physical quantity	Smallest amount used in measurement
1.	Scale	Length	0.1 cm = 1 mm
2.	Stopwatch
3.	Protractor

Discussion

Which physical quantities are these instruments used to measure?
What is the value of the smallest amount that can be measured with these instruments?

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