Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main
Exam
JEE Main
Subject
Physics
Chapter
Mechanical Properties of Solids

JEE Main · Physics · Mechanical Properties of Solids

Uniform pressure p is exerted on all sides of a solid cube at...

Uniform pressure pp is exerted on all sides of a solid cube at temperature t°Ct ° C. By what amount should the temperature be raised in order to bring the volume back to that it had been before the pressure was applied?
(Linear expansivity of the material of the cube is α\alpha and the bulk modulus of elasticity is β\beta)

Options

  1. Apαβ\dfrac{p\alpha}{β}
  2. B3pαβ\dfrac{3p\alpha}{β}
  3. Cαβp\dfrac{\alpha\beta}{p}
  4. Dp3αβ\dfrac{p}{3\alpha\beta}

Correct answer

D. p3αβ\dfrac{p}{3\alpha\beta}

Step-by-step solution

Given that&

Uniform pressure =p= p

temperature =t°C= t ° C

Linear expansivity~of the material of the cube=α= \alpha

Bulk modulus of elasticity~=β= \beta

Let volume expansion coefficient~γ=3α\gamma = 3\alpha

Let change in temperature~=∆t= ∆ t

Change in volume~with temperature is given by

∆V=\gammaV∆t∆ V = \gammaV ∆ t

∴γ=3α∴ \gamma = 3\alpha

⇒∆VV=3α∆t⇒ \dfrac{∆ V}{V} = 3\alpha ∆ t

So~ \left(\dfrac{\Delta V}{V}\right)1 = \gamma\Deltat = 3\alpha\left(\Deltat\right) (bychangeintemperature)</p></blockquote><blockquote><p>and(ΔVV)2=pβ~(by change in temperature)</p></blockquote><blockquote><p>and \left(\dfrac{\Delta V}{V}\right)2 = \dfrac{p}{β} (by pressure)

∴(ΔVV)1=(ΔVV)2∴ \left(\dfrac{\Delta V}{V}\right)1 = \left(\dfrac{\Delta V}{V}\right)2

⇒3α(\Deltat)=pβ⇒ 3\alpha\left(\Deltat\right) = \dfrac{p}{β}

⇒\Deltat=p3αβ</p></blockquote>⇒ \Deltat = \dfrac{p}{3\alpha\beta}</p></blockquote>

Practice Mechanical Properties of Solids on Quantrex Academy →

More from Mechanical Properties of Solids

Figure represents the extension ( Δ l ) of a wire of length 1 meter, suspended from the… JEE Main 2026A lift of mass 1600 kg is supported by thick iron wire. If the maximum stress which the… JEE Main 2026The two wires A and B of equal cross-section but of different materials are joined… JEE Main 2026A copper wire of length 3 m is stretched by 3 mm by applying an external force. The… JEE Main 2026The Young's modulus of steel wire of radius r and length L is Y . If the radius r and… JEE Main 2026Two wires as shown in the figure below, made of steel and have breaking stress of 12 ×… JEE Main 2026A cube has side length 5 cm and modulus of rigidity 10^5 N/m ^2 . The displacement… JEE Main 2026A metal string A is suspended from a rigid support and its free end is attached to a… JEE Main 2026 Full Mechanical Properties of Solids list All 99 Percentile Qs Bank for JEE Main PYQs