Question

The least count of a stop watch is (1//5)s. The time 20 oscillations of a pendulum is measured to be 25 s. The maximum percentage error in this measurement is

Answer 1

Answer:

4%

Explanation:

25/20=1.25

1.25=1.2=0.05

error=(1.2±0.05)

Max % error = (0.05/1.25) × 100 = 4%