Question

Select One Correct Option from the following:In an experiment to determine the acceleration due to gravity g, the formula used for the time period of a periodic motion is $T =2 \pi \sqrt{\frac{7(R-r)}{5g} }$ The values of R and r are measured to be $(60\pm 1) mm$ and $(10\pm 1) mm$ respectively. In five successive measurements, the time period is found to be 0.52 s, 0.56 s, 0.57 s, 0.54 s and 0.59 s. The least count of the watch used for the measurement of time period is 0.01 s. Which of the following statement(s) is(are) true?
(A) The error in the measurement of r is 10%.
(B) The error in the measurement of T is 3.57%.
(C) The error in the measurement of T is 2%.
(D) The error in the determined value of g is 11%.

Answer 1

Option c is the correct answer.