Easy MCQ +4 / -1 PYQ · JEE Mains 2021

An object is located at 2 km beneath the surface of the water. If the fractional compression ${{\Delta V} \over V}$ is 1.36%, the ratio of hydraulic stress to the corresponding hydraulic strain will be ____________. [Given : density of water is 1000 kgm$-$3 and g = 9.8 ms$-$2]

  1. A 1.44 $\times$ 10<sup>7</sup> Nm<sup>$-$2</sup>
  2. B 1.44 $\times$ 10<sup>9</sup> Nm<sup>$-$2</sup> Correct answer
  3. C 1.96 $\times$ 10<sup>7</sup> Nm<sup>$-$2</sup>
  4. D 2.26 $\times$ 10<sup>9</sup> Nm<sup>$-$2</sup>

Solution

$\beta = {{\Delta p} \over {{{\Delta V} \over V}}}$<br><br>$\Rightarrow$ $$\beta = {{\Delta \rho gh} \over {{{\Delta V} \over V}}} = {{1000 \times 9.8 \times 2 \times {{10}^3}} \over {{{1.36} \over {100}}}}$$<br><br>$\Rightarrow$ $\beta$ = 1.44 $\times$ 10<sup>9</sup> N/m<sup>2</sup>

About this question

Subject: Physics · Chapter: Properties of Solids and Liquids · Topic: Elasticity

This question is part of PrepWiser's free JEE Main question bank. 183 more solved questions on Properties of Solids and Liquids are available — start with the harder ones if your accuracy is >70%.

Drill 25 more like these. Every day. Free.

PrepWiser turns these solved questions into a daily practice loop. Chapter-wise drills, full mocks, AI doubt chat. No auto-renew.

Start free →