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DATE:-June 3, 2023

1.
Addition of trivalent impurity to a semiconductor creates many……..

2.
In Modulation, “carrier” is

3.
The initial response when tne output is not equal to input is called

4.
A cordless telephone using separate frequencies for transmission in base and portable units is known as

5.
Grand Central Terminal, Park Avenue, New York is the world’s

7.
A woofer should be fed from the input through a

8.
Name the person who was also known as Deshbandhu.

9.
The Fourier series of an odd periodic function contains

10.
Duality Theorem / Property of Fourier Transform states that _________

11.
A closed loop system is distinguished from open loop system by which of the following ?

12.
To eliminate ghosts in the picture

13.
Which of the following is an open loop control system ?

14.
The random motion of holes and free electrons due to thermal agitation is called ……….

15.
Who is known as “The Saint of Gutters”?

16.
The signal dened by the equations f(t) = 0 for t < 0, f(t) = E for 0 ? t ? a and f(t) = 0 for t > a is

17.
A control system in which the control action is somehow dependent on the output is known as

18.
Commercial Frequency deviation of FM is

19.
Manipulate the following equation to solve for x:

20.
A hole and electron in close proximity would tend to ……….

21.
For attenuation of high frequencies we should use

23.
If the cosine of angle θ is equal to 0.5, and the length of the opposite side is 20 meters, calculate the length of the hypotenuse.

24.
As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor………..

25.
In Pulse Code Modulation system

26.
Damped sinusoids are _____

27.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

28.
Has tendency to oscillate.

29.
When a pure semiconductor is heated,its resistance …………..

30.
Convert an angle of 75 degrees into radians:

31.
The resistivity of pure germanium under standard conditionsis about……….

32.
The resistivity of a pure silicon is about……………

33.
Any externally introduced signal affecting the controlled output is called a

34.
All causal systems must have the component of

35.
An n-type semiconductor is………

36.
When a pentavalent impurity is added to a pure semiconductor,it becomes……

37.
What is the nature of Fourier representation of a discrete & aperiodic signal?

38.
Positive logic in a logic circuit is one in which

39.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

40.
A good control system has all the following features except

41.
Which of the following devices are commonly used as error detectors in instruments ?

43.
Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication

44.
Which of the following ratios is equivalent to the ratio 25:300 ?

45.
By which of the following the control action is determined when a man walks along a path ?

46.
For a low level AM system, the amplifiers modulated stage must be

47.
A semiconductor is formed by……… bonds.

48.
A semiconductor has generally……………… valence electrons.

49.
Which type of system response to its input represents the zero value of its initial condition?

50.
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

51.
Which of the following is an indirect way of generating FM?

52.
A system which is linear is said to obey the rules of

53.
Which of the following statements is correct?

54.
Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________

55.
Manipulate the following equation to solve for x: a = √bx2

56.
Which of the following statements is not necessarily correct for open control system ?

57.
Which of the following should be done to make an unstable system stable ?

58.
In an open loop control system

59.
A hole in a semiconductor is defined as…………….

60.
.... is a part of the human temperature control system.

61.
Which among the following operations is/are not involved /associated with the computation process of linear convolution?

62.
Reactance bipolar transistor

63.
A pentavalent impurity has……….Valence electrons

64.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.

66.
A system is said to be dened as non causal, when

67.
A modem is classified as low speed if data rate handled is

68.
Which of the following does not cause losses in optical fiber cables?

69.
The impurity level in an extrinsic semiconductor is about…..of pure semiconductor.

70.
Under which conditions does an initially relaxed system become unstable ?

71.
A time invariant system is a system whose output

72.
Complex numbers are used in AC circuit analysis primarily to represent:

73.
.... is a closed loop system.

74.
Garampani sanctuary is located at

75.
Solve for both x and y in this simultaneous system of equations: x + 3y = −1, 4x−y = 9

76.
An automatic toaster is a ______ loop control system.

77.
As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

78.
For telegraphy the most commonly used modulation system is

79.
Which among the following belongs to the category of non-recursive systems?

80.
The frequency range of 300 kHz to 3000 kHz is known as

81.
Themost commonlyused semiconductoris………..

82.
VSB modulation is preferred in TV because

83.
The strength of a semiconductor crystal comes from ……..

84.
Factor the following polynomial expression: x2 −x−12

85.
Double integration of a unit step function would lead to

86.
The colour of an object is decided by

87.
A trivalent impurity has…..valence electrons

88.
In a semiconductor,current conduction is due to ……..

89.
Which of the following national parks is not listed in a UNESCO World Heritage site?

90.
Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )?

91.
In closed loop control system, with positive value of feedback gain the overall gain of the system will

92.
Addition of pentavalent impurity to a semiconductor creates many……..

93.
Which crop is sown on the largest area in India?

94.
For open control system which of the following statements is incorrect ?

95.
Which of the following personalities gave ‘The Laws of Heredity’?

96.
A semiconductor has………… temperature coefficient of resistance.

97.
A control system working under unknown random actions is called

98.
A signal g(t) = A then g(t) is a

99.
Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of

100.
The sine function is deﬁned as ratio of side lengths,