Physics Practice: Heat Transfer (Mock Test 3 - Advanced)
1. Why is the base of a cooking pot made of copper or aluminum while the handle is made of ebonite or wood?
2. During the day, why does the air over the land become hotter than the air over the sea?
3. What is the mechanism behind "Sea Breeze" occurring during the daytime?
4. Why does a thick glass tumbler often crack when boiling water is poured into it?
5. Which of the following is true for "Black Bodies" regarding heat radiation?
6. Why are the cooling coils at the back of a refrigerator painted black?
7. A metal ball is heated. Which of the following physical quantities will undergo the least percentage increase?
8. In a thermos flask, the silvered inner walls minimize heat transfer by which process?
9. Which mechanism explains why birds fluff their feathers in cold winter?
10. Why is mercury preferred over water in a thermometer despite water being cheaper?
11. A bimetallic strip is used in a thermostat to:
12. Why do ice cubes melt faster when wrapped in a metal foil than in a woolen cloth?
13. The "Anomalous Expansion" of water is beneficial for aquatic life because:
14. If a body radiates more heat than it absorbs, its temperature will:
15. Why does a person standing near a bonfire receive heat mainly by radiation and not by conduction?
16. The specific heat capacity of water is $4200\ \text{J kg}^{-1}\ \text{K}^{-1}$. This high value means:
17. In which medium is the rate of heat transfer by conduction the highest?
18. Why is it advised to wear white clothes in summer?
19. If the length of a rod is $L$ and the rise in temperature is $\Delta t$, the change in length $\Delta L$ is:
20. Which of the following heat transfer processes does NOT require a material medium?
