Three students 
and 
perform an experiment for determining the acceleration due to gravity 
using a and record time for different number of oscillations. The simple pendulum. They use different lengths of pendulum observations are as shown in the table.
Student No. | Length of pendulum (cm) | No. of oscillations (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 
If 
and 
are the percentage errors in ' 
' for students 1,2 and 3 respectively, then the minimum percentage error is obtained by
Text Solution
Verified by ExpertsA
As 
and 
are same for all observations so 
is minimum for highest value of 
and 
Minimum percentage error in 
is for student number-1
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