A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0°C. What…
Physics · JEE Advanced · NTA Exams — Thermodynamics
A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0°C. What is the change in the diameter of the hole when the sheet is heated to 227°C ? Coefficient of linear expansion of copper = 1.70 × 10–5 K–1.
- Diameter decreases by 7.2 × 10–3 cm
- Diameter increases by 7.2 × 10–3 cm
- Diameter decreases by 1.44 × 10–2 cm
- Diameter increases by 1.44 × 10–2 cm
Answer
(D) Diameter increases by 1.44 × 10 –2 cm
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