Physics - Error Question with Solution | TestHub

PhysicsErrorMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings $5.50 mm$ , $5.55 mm$ , $5.34 mm$ , $5.65 mm$ . The average of these four reading 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 :

Options:

Answer:

Solution:

Significant rule says that reading should has same significant figure as that of reading given.

$5.5375 \to$ rounded to $\to 5.54 .$

0.07395 $\to$ rounded to $\to$ 0.07

therefore, $(5.54 \pm 0.07) m m$

Stream:JEESubject:PhysicsTopic:ErrorSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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