0%

Report a question

You cannot submit an empty report. Please add some details.

Physics – General – LS

Physics – Set 12

Dear ! This is Physics – Set 12  Quiz and it contains 100 questions.

Happy Learning!

1 / 100

1. The audio signals of TV are

2 / 100

2. Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be 

3 / 100

3. Waves that are required for long distance wireless communication are 

4 / 100

4. In a optical fibre cable, the signal is propagated along the  

5 / 100

5. Super conductors are substances that 

6 / 100

6. A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf’s is : 

7 / 100

7. The wave like properties of electrons are useful in

8 / 100

8. A galvanometer can be converted to a voltmeter by connecting

9 / 100

9. The resistance of the human body (dry condition) is of the order of

 

10 / 100

10. Kirchhoff’s laws are applicable to

11 / 100

11. A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?

12 / 100

12. A dynamometer wattmeter can be used for

13 / 100

13. Which electromagnetic radiation is used for satellite communication ? 

14 / 100

14. Low voltage cables are meant for use up to   

15 / 100

15. The ”Choke’ used with a tube light is basically 

16 / 100

16. In radio-communication, the signals emitted by transmitting antenna are reflected on

 

17 / 100

17. The layer of atmosphere used for radio-wave transmission is

18 / 100

18. The working of the quartz crystal in the watch is based on the

19 / 100

19. Negative feedback in amplifiers   

20 / 100

20. A television channel is characterised by

21 / 100

21. Atomic hydrogen has a life period of

22 / 100

22. Which among the following waves is used for communication by artificial satellites ?

23 / 100

23. The purpose of choke in a fluorescent lamp is :

24 / 100

24. When an atom loses an electron it becomes

25 / 100

25. Bandwidth is the

26 / 100

26. The device which transfer the signal from low resistance region to high resistance region is 

 

27 / 100

27. What frequency range is the high frequency band?

28 / 100

28. Radio waves sent out by a radio stations are reflected by

29 / 100

29. A transformer works on the principle of 

30 / 100

30. Kirchoff’s Voltage Law is known as

31 / 100

31. Which of the following is preferred for accelerating electrons? 

32 / 100

32. Which phenomena shows the particle nature of light?   

33 / 100

33. A galvanometer can be converted into a voltmeter by connecting with it a 

34 / 100

34. The device which converts AC to DC is

35 / 100

35. Photon is the fundamental unit/quantum of   

36 / 100

36. The Capacity of a communication channel is measured in 

37 / 100

37. A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

 

38 / 100

38. A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

39 / 100

39. Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?

40 / 100

40. The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by

41 / 100

41. In superconductors, the energy gap is due to

42 / 100

42. Which component of an IED creates an electrical charge?

43 / 100

43. A transformer 

44 / 100

44. The force that binds the neutrons and protons in a nucleus is called as:

45 / 100

45. A device used for converting a.c. into d.c. is called

46 / 100

46. Who discovered X-ray? 

47 / 100

47. Who was the first scientist to discover Electrons?

48 / 100

48. The sharpness of a television image is termed as its

49 / 100

49. What is the name of the device used to convert alternating current into direct current ?   

50 / 100

50. The GPS device in an automobile uses which communication channel?

51 / 100

51. Erg cross Sec is the unit of

52 / 100

52. What part of the atom has a positive charge?

53 / 100

53. A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become

54 / 100

54. Which of the following was the first theory of superconductivity?

55 / 100

55. For photoelectric effect to take place, the metal used as the cathode should have ________   

56 / 100

56. Superconductors are those elements

 

57 / 100

57. An atom with more neutrons than protons is called

58 / 100

58. Proton carry a

59 / 100

59. Alternating current is converted into direct current by a

60 / 100

60. According to the quantum theory of light, the energy of light is carried in discrete units are called

61 / 100

61. A multimeter is used to measure

62 / 100

62. Electrical Pressure is also called

63 / 100

63. Sending a frame to a group of stations is known as

64 / 100

64. What is a neuron ?

65 / 100

65. A wire carrying current is

66 / 100

66. An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?   

67 / 100

67. Electrons carry a

68 / 100

68. Carbon Arc lamps are commonly used in

69 / 100

69. Quality of transmission depends upon

70 / 100

70. Certain substances loose their electrical resistance completely at super low temperature. Such substances are called.

71 / 100

71. The frequency of direct current is ________

72 / 100

72. What is the full form of ”AM’ regarding radio broadcasting?

73 / 100

73. A Step-Up transformer increases

74 / 100

74. Circuit breaker usually operate under   

75 / 100

75. Which of the following is not true about X-rays?

76 / 100

76. Modem is used mostly for ?

77 / 100

77. Which of the following is a device designed to protect electrical devices from voltage spikes?

78 / 100

78. Which of the following has the lowest frequency? 

79 / 100

79. Speed regulation of synchronous motor is   

80 / 100

80. Resistance of human body in dry condition

81 / 100

81. The reverse effect of X–ray emission is

82 / 100

82. The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 127.5 V ? 

83 / 100

83. The best material for the core of a transformer is

84 / 100

84. If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.   

85 / 100

85. Which of the following is the fastest communication channel?

 

86 / 100

86. Why does’nt the hydrogen atom emit X-rays?

87 / 100

87. At low temperature, Lead behaves as a : 

88 / 100

88. The energy of a photon varies directly with its

 

89 / 100

89. According to Rutherford’s atomic model, the electrons inside an atom are

90 / 100

90. The threshold frequency is the frequency below which :

91 / 100

91. Which sources produce alternating current (AC)?

92 / 100

92. What is the size of Electron as comapared to Proton and Neutron?

93 / 100

93. Who indirectly determined the mass of the electron by measuring the charge of the electron? 

94 / 100

94. Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum?

95 / 100

95. In an optical fibre the signal is transmitted 

96 / 100

96. In AC circuits, AC meters measure 

97 / 100

97. Which of the following supports particle nature of photons ?

98 / 100

98. The frequency used in TV and radar system lies in

99 / 100

99. Transformer is a device to convert 

100 / 100

100. Which compressor is usually used in AC?

Your score is

Share this Quiz with your friends! 

LinkedIn Facebook

Follow Us @

0%

Exit

You cannot copy content of this page

Scroll to Top