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Units and Measurement question

2023 · Q131
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Units and Measurement question

2023 · Q131

NEETPhysicsUnits and MeasurementMCQ+4 / −1

The diameter of a spherical bob, when measured with vernier callipers yielded the following values : 3.33 cm,3.32 cm,3.34 cm,3.33 cm3.33 \mathrm{~cm}, 3.32 \mathrm{~cm}, 3.34 \mathrm{~cm}, 3.33 \mathrm{~cm}3.33 cm,3.32 cm,3.34 cm,3.33 cm and 3.32 cm3.32 \mathrm{~cm}3.32 cm. The mean diameter to appropriate significant figures is :

  1. A
    3.328 cm3.328 \mathrm{~cm}3.328 cm
  2. B
    3.3 cm3.3 \mathrm{~cm}3.3 cm
  3. C
    3.33 cm3.33 \mathrm{~cm}3.33 cm
  4. D
    3.32 cm3.32 \mathrm{~cm}3.32 cm
View written solutionFree

Correct answer: C

$$\text { } \begin{aligned} \text { Mean diameter } & =\frac{\mathrm{d}_1+\mathrm{d}_2+\mathrm{d}_3+\mathrm{d}_4+\mathrm{d}_5}{5} \\ & =\frac{3.33+3.32+3.34+3.33+3.32}{5} \\ & =3.328 \approx 3.33 \end{aligned}$$

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