Three students 
and 
perform an experiment for determining the acceleration due to gravity (g) using a simple pendulum. They use different lengths of pendulum and record time for different number of oscillations. The observations are as shown in the table.
Student No. | Length of pendulum (cm) | No. of oscilations (n) | Total time for n oscillations | Time period(s) |
1 | 64.0 | 8 | 128.0 | 16.0 |
2 | 64.0 | 4 | 64.0 | 16.0 |
3 | 20.0 | 4 | 36.0 | 9.0 |
(Least count of length 0.1m least count for time =0.1s) If 
and 
are the percentage errors in 'g' for students 1,2 and 3 respectively, then the minimum percentage error is obtained by student no. ____.
Text Solution
Verified by ExpertsCHECK THE SOLUTION
(1)
As 
and 
are same for all observations so
Minimum percentage error in is for student number-1
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