Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minPYQ_2017

PhysicsEasysingle choice

A steel rail of length $5 m$ and area of cross section $40 {cm}^{2}$ is prevented from expanding along its length while the temperature rises by $10 ° C$ . If coefficient of linear expansion and Young's modulus of steel are $1.2 \times 10^{- 5} K^{- 1}$ and $2 \times 10^{11} N m^{- 2}$ respectively, the force developed in the rail is approximately:

Options:

Answer:

Solution:

$F = Y A α Δ t$

$\Rightarrow F = 2 \times 10^{11} \times 40 \times 10^{- 4} \times 1.2 \times 10^{- 5} \times 10$

$\Rightarrow F = 9.6 \times 10^{4} \approx 1 \times 10^{5} N$ .

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: PYQ_2017

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