Heat Transfer Methods
Physics ⇒ Heat and Thermodynamics
Heat Transfer Methods 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 Heat Transfer Methods.
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 12
A 0.5 m thick wall with an area of 10 m² has a thermal conductivity of 0.8 W/m·K. If the temperature difference across the wall is 20 K, calculate the rate of heat transfer.
A 2 m² black surface at 500 K emits thermal radiation. If the Stefan-Boltzmann constant is 5.67 × 10⁻⁸ W/m²·K⁴, calculate the power radiated.
A metal rod of length 2 m and cross-sectional area 0.01 m² has its ends maintained at 100°C and 0°C. If the thermal conductivity of the metal is 200 W/m·K, calculate the rate of heat transfer through the rod.
A metal spoon is placed in a cup of hot tea. After some time, the handle of the spoon becomes warm. Which method of heat transfer is responsible for this?
A room is heated by a radiator. Explain how heat is transferred from the radiator to the air in the room.
Describe the process of convection and give one example from daily life.
Explain why double-glazed windows are effective in reducing heat loss.
Explain why metals feel colder than wood at the same temperature.
Explain why vacuum flasks are effective at keeping liquids hot or cold.
Explain why wearing light-colored clothes is preferable in hot climates.
State one reason why gases are generally poor conductors of heat.
State Stefan-Boltzmann Law for thermal radiation.
The rate of heat transfer by conduction through a slab is given by the formula Q = kA(ΔT/d). What does 'k' represent in this equation?
