1. Tardigrade
  2. Question
  3. Physics
  4. The least count of a stop watch is (1/5) s. The time of 20 oscillations of a pendulum is measured to be 25 s. What is the maximum percentage error in this measurement?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The least count of a stop watch is $\frac{1}{5} s$. The time of $20$ oscillations of a pendulum is measured to be $25\, s$. What is the maximum percentage error in this measurement?

Physical World, Units and Measurements

Solution:

Error in measuring $25 \,\sec =\frac{1}{5}$
The percentage error $=\frac{1}{5} \times \frac{100}{25}$
$=0.8 \%$