1. The specific heat capacity of a material is the heat absorbed or lost to change the temperature of
Answer: D. 1 kg of the substance by 1 K
Physics Class 10 Unit 10: Heat Capacity and Modes of Heat Transfer MCQs
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2. The formula for specific heat capacity is
Answer: A. c = Q / (mΔT)
3. The SI unit of specific heat capacity is
Answer: C. J kg-1 K-1
4. The SI unit of heat capacity of an object is
Answer: B. J K-1
5. The specific heat of aluminium is 900 J kg-1 K-1. In J g-1 °C-1 this is
Answer: A. 0.9
6. The specific heat of water 4180 J kg-1 K-1 expressed in J g-1 °C-1 is
Answer: C. 4.18
7. Materials of low specific heat are used in heat sinks because they
Answer: B. heat up and cool down quickly
8. Water is used as a coolant in the radiators of automobiles because
Answer: D. it has a large specific heat
9. Coastal areas like Karachi have small temperature variation because
Answer: C. oceans store heat in summer and release it in winter
10. If equal heat is supplied to equal masses of water and copper, the temperature of copper rises faster because
Answer: D. copper has a lower specific heat capacity
11. Two common methods to measure specific heat of solids and liquids are
Answer: A. method of mixtures and electrical heating method
12. In the method of mixtures, heat lost by the hot body is
Answer: B. equal to heat gained by the cold bodies
13. In the electrical heating method, the heat energy supplied by the heater is calculated by
Answer: C. voltage × current × time
14. A 200 g metal is heated from 25 °C to 75 °C using 3500 J. Its specific heat is
Answer: D. 350 J kg-1 K-1
15. The heat absorbed by 0.5 kg of aluminium (c = 900 J kg-1 K-1) heated from 25 °C to 100 °C is
Answer: A. 33.75 kJ
16. The heat given to 25 kg of water to raise its temperature by 50 °C is (c = 4200 J kg-1 K-1)
Answer: B. 5.25 MJ
17. The temperature change of 5 litres of water absorbing 8.4 MJ of heat is (c = 4200 J kg-1 K-1)
Answer: B. 400 °C
18. A 0.5 kg metal block needs 19 kJ to be heated from 30 °C to 80 °C. Its specific heat is
Answer: A. 760 J kg-1 K-1
19. 100 g of water at 80 °C is mixed with 200 g of water at 20 °C. The final temperature is
Answer: D. 40 °C
20. A 3 kg steel rod (c = 460 J kg-1 K-1) cools from 450 °C to 50 °C. The heat lost is
Answer: C. 552 kJ
21. The three methods of heat transfer are
Answer: A. conduction, convection and radiation
22. Thermal conduction takes place mainly in
Answer: C. solids
23. Metals are good conductors of heat because they have
Answer: B. a large number of free electrons
24. In a metal rod, heat is transferred quickly by
Answer: D. free electrons
25. Handles of cooking pans are made of plastic or wood because these are
Answer: C. poor conductors of heat
26. The transfer of heat due to bulk movement of molecules in fluids is called
Answer: B. convection
27. The transfer of heat due to density difference in fluids is
Answer: D. convection
28. When water is heated from the bottom, the hot water rises because it becomes
Answer: A. less dense
29. Upward movement of sea water is called
Answer: D. upwelling
30. Upwelling brings to the surface water that is
Answer: C. colder and rich in nutrients
31. A sea breeze blows during the
Answer: A. day
32. A land breeze blows during the
Answer: B. night
33. During the day, the land becomes hotter than the sea because the land has
Answer: C. low specific heat
34. Birds like eagles, hawks and vultures glide without flapping by riding on
Answer: B. thermals (rising warm air)
35. Hurricanes form over
Answer: D. warm ocean waters
36. The transfer of heat by electromagnetic waves is called
Answer: A. radiation
37. Radiation does not require
Answer: B. a material medium
38. Radiation is the fastest method of heat transfer because it moves at the
Answer: D. speed of light
39. Which combination of heat transfer is dominant when your hand is near, but not touching, a fire?
Answer: C. Radiation and convection
40. The best absorber of radiation is a
Answer: A. dull black surface
41. A good absorber of heat radiation is also a good
Answer: B. emitter
42. Laptop chargers are made with black surfaces because black surfaces are good
Answer: C. emitters
43. Before painting house walls they are made smooth and painted white so that they become
Answer: D. good reflectors and poor absorbers
44. At the same temperature, a hot body with a larger surface area emits
Answer: A. more radiation
45. An object remains at the same temperature when it absorbs and radiates heat at
Answer: C. equal rates
46. The Leslie cube is used to demonstrate how
Answer: D. surface textures affect emission of thermal radiation
47. In a thermos flask, the vacuum between the walls prevents heat transfer by
Answer: B. conduction and convection
48. The inner walls of a thermos flask are silvered to reduce heat loss by
Answer: A. radiation
49. An infrared thermometer detects
Answer: D. infrared radiation emitted by objects
50. The greenhouse effect is the process in which heat is trapped near the Earth's surface by
Answer: C. greenhouse gases
About Physics Class 10 Unit 10 MCQs (Federal Board)
These 70 Physics MCQs cover Class 10 Unit 10: Heat Capacity and Modes of Heat Transfer of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 2 pages of 50. You can also read the Heat Capacity and Modes of Heat Transfer notes for this chapter. Download the Heat Capacity and Modes of Heat Transfer MCQs as a PDF using the button at the top of this page.