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physics 10 heat
Pg.No.
1
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Page 1
Q.1. Which form of energy flows from one body to other body due to difference in temperature between the bodies?
Q.2. On which factor the amount of heat contained in the body depends?
Q.3. If one calorie of energy is consumed,then the work done is?
Q.4. Write the CGS unit of heat?
Q.5. Write the other units of heat other than calorie?
Q.6. Define the amount of heat required to raise the temperature of 1g of pure water through 1 degree celcius?
Q.7. One British Thermal Unit{B.Th.U} is equal to?
Q.8. One Calorie is equal to?
Q.9. One Therm is equal to?
Q.10. One pound calorie is equal to?
Q.11. Name the physical cause which decides the direction of flow of heat from one body to other body?
Q.12. In which direction the heat energy always flow when two bodies are placed in contact?
Q.13. Name the device which is used to measure the temperature of a body?
Q.14. What is the normal temperature of a human body?
Q.15. At which temperature both Celsius and Fahrenheit thermometer reads the same?
Q.16. The clinical thermometer reads from?
Q.17. Freezing point of mercury is?
Q.18. Freezing point of alcohal is?
Q.19. Name the scales of temperature measurement other than Celsius and Fahrenheit scales?
Q.20. Zero degree celsius is equal to how many degree Farhenheit?
Q.21. Zero degree celsius is equal to how many degree Kelvin?
Q.22. Which device is used to measure the temperature of a body by measuring the radiations emitted by the body?
Q.23. Name the amount of heat required to raise the temperature of unit mass of substance through one degree?
Q.24. Write the SI unit of specific heat capacity?
Q.25. Write the specific heat capacity of water?
Q.26. Write the specific heat capacity of ice?
Q.27. Write the specific heat capacity of mercury?
Q.28. Write the specific heat capacity of lead?
Q.29. Which roof white or black,keeps the house cooler in summer due to its more reflection and absorption of heat rays?
Q.30. Why ice wrapped in a blanket donot melts down quickly?
Q.31. Which is the best conductor of heat?
Q.32. Which substances have low specific heat and high conductivity,thus are used in making cooking utensils?
Q.33. Name the phenomenon in which size increases when a body is heated?
Q.34. Which state of matter can undergoes three types of expansions,linear,superficial and cubical?
Q.35. Why telephone wires are kept loose in winters?
Q.36. Why a gap is provided between two iron tracks of the railway track?
Q.37. Name the amount of heat required to raise the temperature of unit mass of substance through one degree celsius?
Q.38. Upto which temperature ,the volume of water decreases on increasing temperature of water from zero degree to four degree celsius?
Q.39. At which temperature the volume of water is minimum and then increases on heating??
Q.40. The behaviour of water at four degree celsius is called as?
Q.41. The transfer of heat from one place to other place is called as?
Q.42. Name the process in which heat is taransferred from one place to other by successive vibrations of the particles of the medium without any bodily movement?
Q.43. Which process takes place in solids for the transmission of heat?
Q.44. Name the process in which heat is taransferred from one place to other by the actual movement of particles of the medium?
Q.45. Which process takes placein liquids and gases for the transmission of heat?
Q.46. By which process,the hot air is escaped in room ventilors?
Q.47. Name the process in which heat is taransferred from one place to other with the speed of light without affecting the intervening medium?
Q.48. By which process the heat from the sun reaches to the earth?
Q.49. Name the law which states that 'The rate of loss of heat by a body is directly proportional to the temperature differences between the body and the surrounding'?
Q.50. Name the law which states that 'The rate of emissive power to absorptive power is same for all surfaces at same temperature and is equal to the emissive power of black body at that temperature'?
Q.51. Name the law which states that good absorbers are good emitters?
Q.52. Name the law which states that 'The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fouth power of its absolute temperature'?
Q.53. Name the process in which a substance is changed from solid state to liquid state?
Q.54. Name the fixed temperature at which fusion takes place?
Q.55. Name the process in which a substance is changed from liquid state to solid state?
Q.56. Name the fixed temperature at which freezing takes place?
Q.57. What happens to the melting point of substances which contracts in the process of fusion{as in ice}?
Q.58. What happens to the melting point of substances which expands in the process of fusion{as in wax}?
Q.59. What happens to the melting point of substances on adding impurity{as salt in ice}?
Q.60. Name the process in which a substance is changed from liquid state to vapour state?
Q.61. Name the process in which vapourisation takes place from the exposed surface of liquid and that at all temperatures?
Q.62. Why earthened pot gets cooled in summer?
Q.63. What is the amount of water vapour present in air called?
Q.64. What is the ratio of amount of water vapour present in a given atmosphere to the amount of watervapour required to saturate the same volume at same temperature known as?
Q.65. Which device is used to measure relative humidity?
Q.66. What happens to relative humidity on increasing temperature?
Q.67. Name the process in which vapourisation takes place at a fixed temperature and from whole apart of liquid?
Q.68. Name the temperature at which boling takes place?
Q.69. Name the process by which a substance is changed from vapour state to liquid state?
Q.70. What happens to the boiling point of liquid on increasing pressure?
Q.71. What happens to the boiling point of liquid on adding impurity?
Q.72. Name the amount of heat required to change the state of unit mass of substance at constant temperature?
Q.73. Write the SI unit of latent heat?
Q.74. Name the amount of heat energy required to convert unit mass of a substance from solid state to liquid state at its M.P.?
Q.75. Write the latent heat of fusion of ice?
Q.76. Name the amount of heat required to convert unit mass of a substance from liquid state to vapour state at its B.P.?
Q.77. Write the heat of vapourisation of steam?
Q.78. Why hot water burns are less severe than that of steam burns?
Q.79. Name the process which directly converts solid into vaour?
Q.80. Which process takes place when boiling point is less than melting point?
Q.81. Which process is shown by camphor or ice in vaccum?
Q.82. Name the process which directly converts vapour into solid?
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