Gujarati
10-1.Thermometry, Thermal Expansion and Calorimetry
medium

If the length of a cylinder on heating increases by $2\%$, the area of its base will increase by ....... $\%$

A

$0.5$

B

$2$

C

$1$

D

$4$

Solution

(d) $A \propto {L^2}$ ==> $\frac{{\Delta A}}{A} = 2 \cdot \frac{{\Delta L}}{L}$ ==> $\frac{{\Delta A}}{A} = 2 \times 2 = 4\% $.

Standard 11
Physics

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