JEE Main 2024 Physics question
Time periods of oscillation of the same simple pendulum measured using four different measuring clocks were recorded as 4.62 s, 4.632 s, 4.6 s and 4.64 s. The arithmetic mean of these reading in correct significant figure is.
Answer: (C)
Solution
The mean is 4.623, but the least precise reading (4.6 s) has two significant figures, so the mean is quoted as 4.6 s.