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Important Questions

Heat Transfer — Important Questions

ICSE · Class 8 · Physics

61 important questions from Heat Transfer for ICSE Class 8 Physics, with answers. Includes multiple choice, multiple correct and true false questions.

61 questions32 flashcards4 formulas & key relations5 concepts

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61 Questions·
multiple choicemultiple correcttrue false

Important Questions from Heat Transfer

1multiple choice
3 marks

A brass plate has area 0.8 m^2 at 0°C. If its coefficient of superficial expansion is 2β for brass based on linear coefficient 19 × 10^-6 per °C, find the increase in area on heating through 50°C.

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1.52 × 10^-3 m^2

For solids, α : β : γ = 1 : 2 : 3, so β = 2α = 2 × 19 × 10^-6 = 38 × 10^-6 per °C. Use A_t - A_0 = A_0 β t. Increase = 0.8 × 38 × 10^-6 × 50 = 1520 × 10^-6 m^2 = 1.52 × 10^-3 m^2.

2multiple choice
3 marks

A steel plate of area 2 m^2 is heated through 30°C. If the coefficient of linear expansion of steel is 13 × 10^-6 per °C, find its increase in area.

Show answer

1.56 × 10^-3 m^2

For solids, β = 2α = 2 × 13 × 10^-6 = 26 × 10^-6 per °C. Using A_t - A_0 = A_0 β t, increase = 2 × 26 × 10^-6 × 30 = 1560 × 10^-6 m^2 = 1.56 × 10^-3 m^2.

3multiple choice
3 marks

A solid has volume 0.5 m^3 at 0°C. Its coefficient of linear expansion is 12 × 10^-6 per °C. Find its increase in volume on heating through 80°C.

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1.44 × 10^-3 m^3

For solids, γ = 3α = 3 × 12 × 10^-6 = 36 × 10^-6 per °C. Use V_t - V_0 = V_0 γ t. Increase = 0.5 × 36 × 10^-6 × 80 = 1440 × 10^-6 m^3 = 1.44 × 10^-3 m^3.

4multiple choice
3 marks

A liquid has volume 2.5 L at 0°C and coefficient of cubical expansion 1.8 × 10^-4 per °C. Find the increase in volume when heated through 20°C.

Show answer

9.0 × 10^-3 L

Use V_t - V_0 = V_0 γ t. Increase = 2.5 × 1.8 × 10^-4 × 20 = 90 × 10^-4 L = 9.0 × 10^-3 L.

+57 more questions on Heat Transfer (ICSE Class 8 Physics)

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Frequently Asked Questions

What are the important topics in Heat Transfer for ICSE Class 8 Physics?
Key topics in Heat Transfer include Molecules, Heat, and Temperature, Evaporation and Boiling, Latent Heat and Change of State, Thermal Expansion of Solids. Study these first, then practise questions on each for Class 8 exams.
How many important questions are there in Heat Transfer?
Super Tutor has 61 practice questions for Heat Transfer, including multiple choice, multiple correct, true false questions. A sample with answers is on this page.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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