Thermal Expansion
Physics ⇒ Heat and Thermodynamics
Thermal Expansion starts at 7 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Thermal Expansion.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A brass plate has an area of 200 cm² at 30°C. If the coefficient of area expansion is 2.2 × 10⁻⁵ /°C, what is its area at 80°C?
A glass beaker is filled to the brim with water at 20°C. What will happen if the temperature is increased to 80°C?
A liquid is heated in a glass container. Which expands more, the liquid or the container?
A metal ball has a diameter of 10 cm at 25°C. If the coefficient of linear expansion is 2 × 10⁻⁵ /°C, what will be its diameter at 75°C?
A metal rod expands by 0.5 cm when heated from 20°C to 70°C. If its original length is 1 m, what is its coefficient of linear expansion?
A steel rod of length 2 m is heated from 20°C to 120°C. If the coefficient of linear expansion for steel is 1.2 × 10⁻⁵ /°C, what is the increase in length?
Describe one practical application of thermal expansion in everyday life.
Describe what happens to the density of a substance as it expands due to heating.
Explain why gaps are left between sections of railway tracks.
Explain why glass windows sometimes crack in winter.
Explain why telephone wires appear to sag more in summer than in winter.
The formula for linear expansion is ΔL = αL₀ΔT. What does α represent in this formula?
What is meant by thermal expansion?
Why are iron rims heated before being fitted onto wooden wheels?
