Question

A stop watch has 10 divisions graduated between the 0 and 5s marks. What is its least count?

February 4, 2024

Answer

Least count (L.C.) = x/n

Value of one div = x
Total no. of div on stopwatch = n

Total number of divisions on stopwatch = 10

Least count (L.C.) = x/n

= 5/10

= 1/2

⇒L.C. = 0.5 s

Hence, the least count of the stopwatch is 0.5s.

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