Physics-xii Heat Test-01

Physics-XII

HEAT

TEST-01

1. The capacity to do work is called as: a) Power b) Energy c) Torque d) Heat 2. The study of energy of molecules due to random or disordered motion of these molecules is known as: a) Thermal Physics b) Thermodynamics c) Electrostatics d) Electricity 3. _____is defined as an agent, which produces sensation of warmth or hotness in us. a) Heat b) Work c) Temperature d) Electricity 4. Initially in 1783, A. Lavoisier developed that heat was considered as a invisible fluid and contained in material body called as a) Caloric b) Energy c) Torque d) Temperature 5. The word caloric comes from Latin Calor, meaning ______. a) Caloric b) Energy c) heat d) Temperature 6. In 1798, _____ published a report on his investigation of the heat produced while manufacturing cannons. a) Lavoisier b) P. Joule c) Count Rumford d) J. Dalton 7. The count Rumford regarded ______ as weightless because the rise or fall in temperature of body did not affect its weight. a) Caloric b) Energy c) Temperature d) Work 8. _____ had observed the frictional heat generated by boring cannon at the arsenal in Munich. a) Lavoisier b) P. Joule c) Count Rumford d) J. Dalton 9. _____ showed that the water could be boiled within roughly two and half hours and that the supply of frictional heat was seemingly inexhaustible form boring of canon. a) Lavoisier b) P. Joule c) Count Rumford d) J. Dalton 10. The Count Rumford argued that the in exhaustive generation of heat was incomplete with the caloric theory. a) Caloric theory b) Mechanical theory c) Modern theory d) Joule’s theory 11. The Count Rumford said that heat is a) b/c of motion of molecules b) measure of work done c) fluid that contained in body d) both (a) & (b) 12. German Scientist Count Rumford observed that, the heat is a) b/c of molecules are in ordered motion b) caloric substance c) fluid substance d) b/c of molecules are in random motion 13. The ____ failed later as it was unable to explain the production of heat by friction. a) Caloric theory b) Mechanical theory c) Modern theory d) Joule’s theory 14. _____ developed that if amount of work disappears a quantity of heat is produced. a) Lavoisier b) P. Joule c) Count Rumford d) J. Dalton 15. P. Joule observed that the heat is a) b/c of molecules are in ordered motion b) caloric substance c) fluid substance d) Form of energy 16. In modern theory, amount of energy transferred from hot to cold body is called_____. a) Power b) Energy c) Torque d) Heat 17. Heat is also called a) energy in stress b) energy in power c) energy in transit d) energy in elasticity 18. The total kinetic energy of the molecules of a body determines? a) Power b) Energy c) Torque d) Heat 19. The exchange of energy between two objects because of their temperature difference is called: a) Power b) Energy c) Torque d) Heat 20. Heat transferred is due to change of ____. a) Charge b) Internal Energy c) Torque d) Temperature 21. Two ends "A" and "B" of a rod are temperature -10o C and -30o C, the heat will flow from a) -30 to -10 C b) -30 to -50 C c) -10 to -30 C d) -10 to -20 C 22. The SI unit of heat is: a) joule b) Pascal c) Joule • sec d) erg 23. The practical unit of heat in CGS system is: a) joule b) Caloric c) Joule • sec d) BTU

Engr: Kashif Ali Magsi

Physics-XII

HEAT

24. The unit of heat in CGS system is: 2 a) joule b) ft•lb/sec 25. Which of the following is not unit of energy? a) watt . sec b) erg 26. The heat can be measured in: a) joule b) ft.lb 27. 1 BTU = ? a) 41.8 J

TEST-01 c) Joule • sec

d) erg

c) electron volt

d) N.O.T

c) BTU

d) A.O.T

b) 0.428 J

c) 1055 J

d) 3.6 J

b) 4.18 J

c) 18.4 J

d) 4.35 J

c) N • m

d) A.O.T

28. One Calorie is equal to: a) 41.8 J

29. 1 joule = ? 7

a) 10 erg

2

2

b) 1 kg m / s

30. If 20 calories of work is transferred as heat, how many Joules of heat are there? a) 83.6 J b) 20 J c) 4.8 J d) 0.48J 31. One calorie of heat is equivalent to 4.2 J. One BTU (British thermal unit) is equivalent to 1055 J. The value of one BTU in calorie is : (a) 251.2 cal (b) 200 cal (c) 263 cal (d) none of these 32. Dimension of heat is a) M0 L0 T-1 b) ML2T-2 c) M-1LT-1 d) MLT 33. With increase in temperature, heat will be: a) Increase b) Decrease c) remain same d) N.O.T 34. If a substance is hot, its particles will a) move fast than the cooler object b) move slow than the cooler object c) move as the cooler object d) may move fast or slow than the cooler object 35. How we measure energy value of food? a) joule b) erg c) joule / sec d) calorie 36. Heat can be propagated in a) conduction b) convection c) radiation d) A.O.T 37. Convection is a transfer of heat due to a) vibration of the molecules b) expansion of fluid c) movement of molecules from one place to another d) radiation of wave 38. Conduction is a transfer of heat due to a) vibration of the molecules b) differences in densities c) movement of molecules from one place to another d) radiation of wave 39. Radiation is a transfer of heat due to a) vibration of the molecules b) differences in densities c) movement of molecules from one place to another d) radiation of wave 40. Which of the following heat transfer processes can take place in vacuum? I. convection II. Conduction III. Radiation a) I only b) I & II only c) I, II & III only d) III only 41. Which of the following heat transfer processes ia/are caused by the movement of particles? I. convection II. Conduction III. Radiation a) I only b) I & II only c) II only d) III only 42. Once heats enter a body, it becomes its a) constant energy b) Internal Energy c) negative energy d) external energy 43. When two bodies are in thermal equilibrium which condition must apply? a) They are at the same temperature b) Their internal energies are equal c) Their heat capacities are equal d) A.O.T 44. Total sum of its PE and KE of its molecules a) Constant energy b) Internal Energy c) Negative energy d) External energy 45. Which one is true for internal energy? a) It is sum of all forms of energies of molecules b) It is a state function of a system

Engr: Kashif Ali Magsi

Physics-XII

HEAT

TEST-01

c) It is proportional to transnational K.E of the molecules d) All are correct 46. We can produce heat by a) Frictional process b) Chemical processes c) Electrical processes d) All of the above 47. ______ was one of the first to use a calorimeter to measure the heat changes during chemical reaction. a) Lavoisier b) P. Joule c) Count Rumford d) J. Dalton

Engr: Kashif Ali Magsi