Quiz for Thermal Expansion-

Q1: What is the unit of coefficient of linear expansion?

A. K B. °C⁻¹ C. m/K D. m/°C

Q2: Which material has the highest coefficient of linear expansion?

A. Aluminum B. Copper C. Iron D. Glass

Q3: Which formula represents linear expansion?

A. ΔL = αLΔT B. ΔL = L/αΔT C. ΔT = αLΔL D. α = ΔLΔT/L

Q4: If the temperature of a rod is doubled, the increase in length is:

A. Doubled B. Halved C. Tripled D. Remains same

Q5: Which of the following expands least when heated?

A. Gas B. Liquid C. Solid D. All expand equally

Q6: A metal rod expands by 1 mm when heated from 0°C to 100°C. How much will it expand from 0°C to 200°C?

A. 1 mm B. 2 mm C. 0.5 mm D. Cannot be determined

Q7: Which of the following is not a type of thermal expansion?

A. Linear B. Area C. Volume D. Mass

Q8: In bimetallic strips, metals bend because:

A. They expand equally B. They contract unequally C. They expand unequally D. None of these

Q9: Thermal expansion in liquids is measured using:

A. Thermometer B. Manometer C. Barometer D. Hygrometer

Q10: The coefficient of volume expansion is approximately how many times the linear expansion for solids?

A. 2 B. 3 C. 1.5 D. 0.5

Q11: Which substance shows anomalous expansion?

A. Water B. Iron C. Mercury D. Alcohol

Q12: The SI unit of thermal strain is:

A. K⁻¹ B. m C. Dimensionless D. °C⁻¹

Q13: Which of the following instruments works on thermal expansion of solids?

A. Spring balance B. Thermocouple C. Thermostat D. Barometer

Q14: If α is the coefficient of linear expansion, then the coefficient of superficial expansion is:

A. α B. 2α C. 3α D. α/2

Q15: A brass and an iron rod have equal lengths at 0°C. On heating, brass becomes longer because:

A. It has a greater α B. It has a higher density C. It absorbs more heat D. It is less hard

Q16: Which law governs the linear expansion of solids?

A. Boyle’s Law B. Hooke’s Law C. Newton’s Law D. No specific law

Q17: Thermal expansion is caused due to:

A. Decrease in kinetic energy B. Increase in kinetic energy C. Loss of electrons D. Decrease in volume

Q18: Which material has negligible expansion with temperature?

A. Invar B. Steel C. Brass D. Copper

Q19: If the length of a rod increases by 0.02% when heated by 100°C, then α is:

A. 2 × 10⁻⁴ /°C B. 2 × 10⁻⁶ /°C C. 2 × 10⁻² /°C D. 2 × 10⁻³ /°C

Q20: Which of the following expands the most for the same rise in temperature?

A. Solid B. Liquid C. Gas D. All same