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DATE:-October 15, 2024

1.
The resistivity of pure germanium under standard conditionsis about……….

3.
Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )?

4.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

5.
A good control system has all the following features except

6.
To eliminate ghosts in the picture

7.
Addition of pentavalent impurity to a semiconductor creates many……..

8.
Manipulate the following equation to solve for x:

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

11.
A cordless telephone using separate frequencies for transmission in base and portable units is known as

12.
The initial response when tne output is not equal to input is called

13.
The resistivity of a pure silicon is about……………

14.
In Modulation, “carrier” is

15.
Which of the following statements is not necessarily correct for open control system ?

16.
A system is said to be dened as non causal, when

17.
An automatic toaster is a ______ loop control system.

18.
.... is a closed loop system.

19.
Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication

20.
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.

21.
Has tendency to oscillate.

22.
Positive logic in a logic circuit is one in which

23.
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

24.
Which of the following should be done to make an unstable system stable ?

25.
A semiconductor is formed by……… bonds.

26.
Complex numbers are used in AC circuit analysis primarily to represent:

27.
Which crop is sown on the largest area in India?

28.
Themost commonlyused semiconductoris………..

29.
For telegraphy the most commonly used modulation system is

30.
.... is a part of the human temperature control system.

32.
Which of the following national parks is not listed in a UNESCO World Heritage site?

33.
A trivalent impurity has…..valence electrons

34.
A closed loop system is distinguished from open loop system by which of the following ?

35.
Any externally introduced signal affecting the controlled output is called a

36.
A system which is linear is said to obey the rules of

37.
Which of the following ratios is equivalent to the ratio 25:300 ?

38.
Which type of system response to its input represents the zero value of its initial condition?

39.
Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________

40.
Reactance bipolar transistor

41.
A pentavalent impurity has……….Valence electrons

42.
The sine function is deﬁned as ratio of side lengths,

43.
The impurity level in an extrinsic semiconductor is about…..of pure semiconductor.

44.
Under which conditions does an initially relaxed system become unstable ?

45.
A semiconductor has………… temperature coefficient of resistance.

46.
Which among the following operations is/are not involved /associated with the computation process of linear convolution?

47.
In closed loop control system, with positive value of feedback gain the overall gain of the system will

48.
A control system in which the control action is somehow dependent on the output is known as

49.
Which of the following personalities gave ‘The Laws of Heredity’?

50.
A signal g(t) = A then g(t) is a

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

52.
Garampani sanctuary is located at

53.
In a semiconductor,current conduction is due to ……..

54.
As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

55.
By which of the following the control action is determined when a man walks along a path ?

56.
An n-type semiconductor is………

57.
Which among the following belongs to the category of non-recursive systems?

58.
Manipulate the following equation to solve for x: a = √bx2

59.
A semiconductor has generally……………… valence electrons.

60.
The Fourier series of an odd periodic function contains

61.
A control system working under unknown random actions is called

62.
The strength of a semiconductor crystal comes from ……..

63.
A time invariant system is a system whose output

64.
Grand Central Terminal, Park Avenue, New York is the world’s

65.
Which of the following devices are commonly used as error detectors in instruments ?

66.
As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor………..

67.
For attenuation of high frequencies we should use

68.
The random motion of holes and free electrons due to thermal agitation is called ……….

70.
A woofer should be fed from the input through a

71.
A hole and electron in close proximity would tend to ……….

72.
When a pentavalent impurity is added to a pure semiconductor,it becomes……

73.
Commercial Frequency deviation of FM is

74.
Double integration of a unit step function would lead to

75.
Which of the following does not cause losses in optical fiber cables?

76.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

77.
A modem is classified as low speed if data rate handled is

78.
Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of

79.
In Pulse Code Modulation system

80.
Who is known as “The Saint of Gutters”?

81.
Factor the following polynomial expression: x2 −x−12

82.
What is the nature of Fourier representation of a discrete & aperiodic signal?

83.
For a low level AM system, the amplifiers modulated stage must be

84.
When a pure semiconductor is heated,its resistance …………..

85.
In an open loop control system

86.
Name the person who was also known as Deshbandhu.

87.
The colour of an object is decided by

88.
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

89.
All causal systems must have the component of

90.
Convert an angle of 75 degrees into radians:

91.
Duality Theorem / Property of Fourier Transform states that _________

92.
Which of the following statements is correct?

93.
VSB modulation is preferred in TV because

94.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.

95.
A hole in a semiconductor is defined as…………….

96.
For open control system which of the following statements is incorrect ?

97.
The frequency range of 300 kHz to 3000 kHz is known as

98.
Which of the following is an open loop control system ?

99.
Damped sinusoids are _____

100.
Addition of trivalent impurity to a semiconductor creates many……..