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. Proton carry a

2 / 100

2. Who was the first scientist to discover Electrons?

3 / 100

3. Which electromagnetic radiation is used for satellite communication ? 

4 / 100

4. In an optical fibre the signal is transmitted 

5 / 100

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

6 / 100

6. A dynamometer wattmeter can be used for

7 / 100

7. Carbon Arc lamps are commonly used in

8 / 100

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

9 / 100

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

10 / 100

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

11 / 100

11. The threshold frequency is the frequency below which :

12 / 100

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

13 / 100

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

14 / 100

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

15 / 100

15. The energy of a photon varies directly with its

 

16 / 100

16. Superconductors are those elements

 

17 / 100

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

18 / 100

18. What is a neuron ?

19 / 100

19. 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 : 

20 / 100

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

21 / 100

21. The Capacity of a communication channel is measured in 

22 / 100

22. In AC circuits, AC meters measure 

23 / 100

23. What frequency range is the high frequency band?

24 / 100

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

25 / 100

25. The audio signals of TV are

26 / 100

26. A wire carrying current is

27 / 100

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

28 / 100

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

29 / 100

29. Kirchhoff’s laws are applicable to

30 / 100

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

31 / 100

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

32 / 100

32. A transformer works on the principle of 

33 / 100

33. When an atom loses an electron it becomes

34 / 100

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

35 / 100

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

36 / 100

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

37 / 100

37. Alternating current is converted into direct current by a

38 / 100

38. Circuit breaker usually operate under   

39 / 100

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

40 / 100

40. 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?

41 / 100

41. The frequency of direct current is ________

42 / 100

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

43 / 100

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

44 / 100

44. 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

45 / 100

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

 

46 / 100

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

47 / 100

47. At low temperature, Lead behaves as a : 

48 / 100

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

49 / 100

49. Erg cross Sec is the unit of

50 / 100

50. Super conductors are substances that 

51 / 100

51. 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?

52 / 100

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

53 / 100

53. Speed regulation of synchronous motor is   

54 / 100

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

55 / 100

55. The reverse effect of X–ray emission is

56 / 100

56. A Step-Up transformer increases

57 / 100

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

58 / 100

58. The device which converts AC to DC is

59 / 100

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

60 / 100

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

61 / 100

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

 

62 / 100

62. Negative feedback in amplifiers   

63 / 100

63. 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

 

64 / 100

64. Atomic hydrogen has a life period of

65 / 100

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

66 / 100

66. In superconductors, the energy gap is due to

67 / 100

67. An atom with more neutrons than protons is called

68 / 100

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

 

69 / 100

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

 

70 / 100

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

71 / 100

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

72 / 100

72. 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 

73 / 100

73. Transformer is a device to convert 

74 / 100

74. Electrical Pressure is also called

75 / 100

75. 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 ? 

76 / 100

76. Electrons carry a

77 / 100

77. Resistance of human body in dry condition

78 / 100

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

79 / 100

79. A multimeter is used to measure

80 / 100

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

81 / 100

81. Bandwidth is the

82 / 100

82. Low voltage cables are meant for use up to   

83 / 100

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

84 / 100

84. The wave like properties of electrons are useful in

85 / 100

85. Which sources produce alternating current (AC)?

86 / 100

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

87 / 100

87. A transformer 

88 / 100

88. 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?   

89 / 100

89. Which phenomena shows the particle nature of light?   

90 / 100

90. Modem is used mostly for ?

91 / 100

91. Photon is the fundamental unit/quantum of   

92 / 100

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

93 / 100

93. A television channel is characterised by

94 / 100

94. Quality of transmission depends upon

95 / 100

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

96 / 100

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

97 / 100

97. Which compressor is usually used in AC?

98 / 100

98. Kirchoff’s Voltage Law is known as

99 / 100

99. Which of the following has the lowest frequency? 

100 / 100

100. Who discovered X-ray? 

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