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Important Questions

Heat Transfer

ICSE · Class 8 · Physics

Most important questions from Heat Transfer for ICSE Class 8 Physics board exam 2026. MCQs, short answer, and long answer questions with marks.

61 questions32 flashcards5 concepts

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61 Questions·
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Sample Questions

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.

Show answer

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.

Show answer

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.

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Frequently Asked Questions

What are the important topics in Heat Transfer for ICSE Class 8 Physics?
Heat Transfer covers several key topics that are frequently asked in ICSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Heat Transfer — ICSE Class 8 Physics?
Understand the core concepts first, then work through the 61 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Heat Transfer?
There are 61 practice questions available for Heat Transfer. These cover multiple question types including MCQs, short answer, and long answer questions.

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

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