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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

The gap between any two rails, each of length $ℓ$ laid on a railway track equals x at $2 7^{\circ} C$ . When the temperature rises to 40°C, the gap closes up. The co-efficient of linear expansion of the material of the rail is a. The length $ℓ$ of a rail at 27°C will be

Options:

Answer:

Solution:

$Δ ℓ = x = ℓ_{0} \propto Δ T$ $ℓ_{0} = \frac{x}{13 α}$

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

⏱ 2mℹ️ Source: QB

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