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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A thin wire of length $ℓ$ when heated to a certain temperature increases its length by 1%. A sheet of the same material of area $2 ℓ \times ℓ$ is heated to the same temperature increase in area will be

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Answer:

Solution:

$A = ℓ^{2} \Rightarrow \frac{dA}{A} = \frac{2Δ ℓ}{ℓ} \Rightarrow \frac{dA}{A} = 2%$

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

⏱ 2mℹ️ Source: QB

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