A student measures time for 20 oscillations of a simple pendulum as 30 s. 32 s, 35 s and 31 s. 1f the minimum division in the measuring clock is I s, then correct mean time in second is
A. 32 ± 3
B. 32 ± 1
C. 32 ± 2
D. 32 ± 5
Answer:C
A student measures time for 20 oscillations of a simple pendulum as 30 s. 32 s, 35 s and 31 s. 1f the minimum division in the measuring clock is I s, then correct mean time in second is
A. 32 ± 3 B. 32 ± 1 C. 32 ± 2 D. 32 ± 5