Lecturer Physics Fully Solved Paper
PPSC Lecturer Physics (BS-17) Fully Solved
1. The physics underlying the operation of the refrigerator most closely resemble the physics underlying :
2. The law that governs the force between electric charges bears the name of :
3. The electric volt is the unit of:
4. A certain wire has a resistance R. The resistance of another wire identical with the first except for having twice its diameter is:
5. The separation between the plates of a parallel plate capacitor whose original capacitance was C is doubled. The capacitance is now:
6. The time required to charge a capacitor depends upon:
7. A current is flowing north along a power line. The direction of the magnetic field above it, neglecting the earth's field, is:
8. When a dia magnetic substance is inserted into the current carrying coil, the magnetic field:
9. The time required for the charged particle to make a complete revolution in a magnetic field does not depend upon :
10. The fact that an electric field is produced in a conductor whenever magnetic lines of force move across it is referred to as:
11. Lenz's law is the consequence of the law of conservation of:
12. A dynamic is often set to generate electricity. It actually acts as a source of:
13. The time required for a current to be established in a circuit depends upon:
14. Which of the following is not electromagnetic in nature?:
15. Beats are the result of:
16. Longitudinal waves do not exhibit:
17. A crucial experiment thatled to the theory of relativity was performed by:
18. An observer moves past a stationery electron on the earth's surface. His instruments measure:
19. Relative to the original photon, the photon that emergesfrom a collision with an electron as:
20. Modern physical theories indicate that:
21. The total energy of an atomic electron is:
22. A hydrogen atom is in its ground state when its orbital electron:
23. The energy of the quantum states is primarily dependent upon the quantum number:
24. The two electrons in a helium atom:
25. There are no expected linesabsent from the spectra of:
26. A molecule has charge distribution is not perfectly symmetrical is called:
27. A vacuum tube will conduct only if its plate is ______________ with respect to the cathode.:
28. Which tube generates the greatest noise? :
29. A vacuum diode acts as a ____________ switch.:
30. With rise of temperature, the angle of contact of liquid:
31. Valves in a radio receiver generally employ _________ heated cathodes:
32. Which valve has the lowest amplification factor :
33. A pentode is a.................. device. :
34. The indirectly heated cathode of the diode is coated with:
35. What started conduction in thecold cathode tube? :
36. What is the solid state equivalent of cold cathode tube? :
37. One fermi is equal to:
38. What is full form of LED:
39. A grid controlled vacuum tube act as:
40. The filament voltage is a direct measure of:
41. The following is an intensive coordinate of the thermodynamic system in equilibrium state? :
42. The type of work which cannot be described in macroscopic thermodynamics:
43. All natural process are:
44. For a reversible adiabatic process:
45. Neutrions are emitted in the following decay:
46. For the structure of nucleus, the number 28 is:
47. Positron was discovered by:
48. Zener diode is used for:
49. Nuclear force is a:
50. Defect of colour blindness can be cured by the using a:
51. The heaviest Class of elementry particles consists of the?:
52. The quantum number which is not involved in describing the orbit of an atomic electron is:
53. The ionization energy of an atom relative to biding energy of its nucleus is:
54. If two systems "A" & "B" are in thermal equilibreum with a system "c" ,then....... are not in equilibreum:
55. The following is an intensive coordinate of a thermodynamics system in equilibreum state:
56. The type of work which cannot be described in microscopic thermodynamics:
57. In thermodynamics, Workdone by the system is taken as:
58. The SI unit of Specific heat capacity is:
59. All natural processes are:
60. When a horse pulls a wagon,the force that causes the horse to move forward is the force:
61. The minimum number of unequal forces whose vector sum can equal Zero is:
62. A force of 3n acts perpendicularly to a force 4n,there resultant has a magnitude of :
63. A body in equilibreum may not have:
64. In Order to cause a moving body to pursue a circular path,it is necessary to apply:
65. A hole is drilled through the earth along a diameter & a stone dropped into it,when stone is at the center of earth it has?:
66. The rotational analog of force in linear motion is:
67. According to Hook's Law the force needed to applied on elastic body by an amount "s" is prportional to:
68. A sharing stress that acts on a body affects its:
69. In S.H.M, there is always a constant ratio between the displacement of mass and its:
70. Waves transmit from one place to another:
71. Of the following properties of a wave,the one that is independent of the other is its?:
72. When a sound wave goes from air into water, the quantity that remains unchanged is its:
73. Two blocks of lead,one twice as heavy as the other , are both at 50 degree centigrade.The ratio of heat constant of heavier block to that of the lighter block is:
74. "Heat" is closely related to:
75. Sublimation refers to:
76. Under Conditions correspondings to its triple point,a substance:
77. The ratio between the energy dissipated in some process & heat that appears as a result is the:
78. The smallest sub division of a compound that exhibit its characteristics properties is called:
79. The energy of the molecular motion appears in the form of:
80. The ionization energy of an atom relative to the binding energy of its nucleus:
81. Yukawa's theory suggest that nuclear forces arives through the exchange of:
82. The tunnel affect makes possible:
83. The first phase of nuclear reaction involves the formation of:
84. Of the following elementry particles,the one that never decays in free space is the:
85. Unstable elementry particles heavier than the proton are called:
86. A quantity not always conserve in the decay of elementary particles is:
87. On molding grid potential excesively negative plate resistance is ?:
88. What are the two principle electrodes in every tube?:
89. In a vacuume diode can be used as:
90. The temperature Co-efficient of resistance of a semi conductor is:
91. For rectifying action we use:
92. A.C plate resistance of a diode valve at saturation is:
93. Which is not the basic operation of Boolean Variables:
94. A forward biased p-n junction practically offers?:
95. A solid state detector basically:
96. The ratio of the inertial mass to the gravitational mass is :
97: Mean free path of the moleculas of a gas depends on the pressure 'P' as
98.The mass of neutrino is:
99.Unstable elementary particles heavier than the proton are called:
100.Electromagnetic waves transport:
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