Unit 12: Thermal Properties of Matter — Online MCQ Test
PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board
Practice Unit 12: Thermal Properties of Matter with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers temperature heat measurement thermal expansion specific heat capacity calorimetry latent heat and heat transfer mechanisms conduction convection radiation..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Unit 12: Thermal Properties of Matter — Important Questions & Answers
Which of the following is the SI unit of heat?
- A. Joule
- B. Calorie
- C. Kelvin
- D. Watt
Answer: A. Joule
Heat is a form of energy, and the SI unit of energy is joule.
Heat is a form of energy, and the SI unit of energy is joule.
The process of transfer of heat by direct molecular collision in a substance is called:
- A. Conduction
- B. Convection
- C. Radiation
- D. Evaporation
Answer: A. Conduction
In conduction, heat is transferred from the hotter region to the colder region through collisions between neighboring particles.
In conduction, heat is transferred from the hotter region to the colder region through collisions between neighboring particles.
A metal rod is heated uniformly. What happens to its length?
- A. It decreases
- B. It increases
- C. It remains unchanged
- D. It first decreases and then increases
Answer: B. It increases
Most solids expand on heating, so the length of the metal rod increases due to thermal expansion.
Most solids expand on heating, so the length of the metal rod increases due to thermal expansion.
Which of the following increases the rate of conduction through a metal rod?
- A. Decreasing temperature difference
- B. Increasing length of the rod
- C. Increasing cross-sectional area
- D. Using a material with lower thermal conductivity
Answer: C. Increasing cross-sectional area
The rate of conduction is directly proportional to cross-sectional area and temperature difference, and inversely proportional to length.
The rate of conduction is directly proportional to cross-sectional area and temperature difference, and inversely proportional to length.
Which statement about radiation is correct?
- A. It requires a material medium
- B. It cannot occur in vacuum
- C. It is the fastest mode of heat transfer
- D. It occurs only in solids
Answer: C. It is the fastest mode of heat transfer
Radiation transfers heat through electromagnetic waves and can travel through vacuum at the speed of light.
Radiation transfers heat through electromagnetic waves and can travel through vacuum at the speed of light.