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Heat Transfer — Practice Quiz

ICSE · Class 8 · Physics

Try a 4-question quiz on Heat Transfer for ICSE Class 8 Physics: tap an answer to check it and see why. 61 questions in the full chapter test.

61 questions32 flashcards4 formulas & key relations5 concepts

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Quick Quiz: Heat Transfer

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1

A copper rod of length 2.5 m is heated through 40°C. Find its increase in length if the coefficient of linear expansion of copper is 17 × 10^-6 per °C.

2

A brass rod 1.2 m long is heated from 20°C to 70°C. Find its increase in length if the coefficient of linear expansion of brass is 19 × 10^-6 per °C.

3

An iron bar of length 3 m is heated so that its length increases by 1.08 mm. Find the temperature rise if the coefficient of linear expansion of iron is 12 × 10^-6 per °C.

4

A copper rod and an iron rod have the same original length and are heated through the same temperature rise. If the iron rod lengthens by 2 mm, find the increase in length of the copper rod.

61 Questions·
multiple choicemultiple correcttrue false

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.

+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 practice questions are there for Heat Transfer?
There are 61 questions on Heat Transfer. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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

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