Verified Solution • 2025–26 Session
moderate
QJEEM20Ph9791: JEE Main 2020 Physics - Class 11 JEEM20Ph9791 Solution: A student measuring the diameter of a pencil of circular…
A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50 mm, 5.55 mm, 5.45 mm, 5.65 mm. The average of these four readings is 5.5375 mm and the standard deviation of the data is 0.07395 mm. The average diameter
of the pencil should therefore be recorded as :
of the pencil should therefore be recorded as :
Multiple Choice Options
- A (5.54 ± 0.07) mm
- B (5.5375 ± 0.0740) mm
- C (5.5375 ± 0.0739) mm
- D (5.538 ± 0.074) mm
Step-by-Step Verified Solution
Given, dav = 5.5375 mm
Significant rule says that reading should has same significant figure as that of reading given.
Significant rule says that reading should has same significant figure as that of reading given.