Question

In an experiment to determine the boiling point of water, the stop watch used to note down the temperature of water at different intervals of time has 20 divisions between 0 to 10s marks. Find the least count of the stop watch.

Answer 1

There are 20 divisions between 0 to 10s, this means that there are two divisions in between 0 and 1.

LC=Main scale reading/ number of divisions

 =1/2

LC=0.5

Answer 2

There are 20 divisions between 0 to 10s, this means that there are two divisions in between 0 and 1.
lc=0.5