Question

If the time interval between the 30 s mark and 35 s mark of a stopwatch has 25 equal divisions, what would be the least count of the stop watch?

Answer 1

Answer:

Percentage error in time period =

timetaken

leastcount×100

=

40

0.5×100

=1.25%

Answer 2

Answer:

0.2s

Explanation:

35 - 30 s = 5 seconds

5 s = 25 divisions

25/5 divisions = 1 s

1 s = 5 divisions

1/5 = least count

0.2 s = least count

Thanks.