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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minQB

PhysicsEasysingle choice

A hole is drilled in a copper sheet. The diameter of the hole is 4 cm at 27.0°C. Coefficient of linear expansion of copper is $1.70 \times 1 0^{- 5} K^{- 1}$ . Diameter of the hole when the sheet is heated to $22 7^{\circ} C$

Options:

Answer:

Solution:

The hole expands with the sheet.

$Δ T = 227 - 27 = 200 K$

$Δ D = D α Δ T$

$Δ D = 4 \times 1.70 \times 1 0^{- 5}$

$\times 200 cm$

$Δ D = 0.0136 cm$

$Δ D = 0.136 mm$

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

⏱ 2mℹ️ Source: QB

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