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PHYSICS 2nd Year MCQs Chapter No.7 ELECTRONICS Test No.1

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PHYSICS – 2nd Year
Chapter Name : ELECTRONICS
Chapter No. 7  [ Test No.1 ]
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.

 








Book Name :  PHYSICS
Chapter No. 7 ( Test No. 1 )
Chapter Name : ELECTRONICS 
Total MCQ from Text Book :  107
Book Version  :
2021

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade  : 12 ( F.Sc. Intermediate)
Total Marks : 107
Total Time :   107 minutes




3
Created on By user

GRADE 12 - PHYSICS CHAPTER NO.7 ELECTRONICS Test No.1

GRADE 12 - PHYSICS CHAPTER NO.7 ELECTRONICS Test No.1

1 / 107

The number of valence electrdns in Si or Ge are:

2 / 107

A signal appears after amplification, at the output terminal without any change of phase, if it is applied at:

3 / 107

The output of AND gate will be zero when:

4 / 107

Transistors with various combinations are widely used as switches in:

5 / 107

Rectification is done by:

6 / 107

The forward resistance of the p-n junction is expressed as:

7 / 107

The resistance between inverting (-) and non-inverting (+) terminal of the op-amp is known as:

8 / 107

The negative sign in the gain' of an inverting amplifier indicates that the output signal is:

9 / 107

When an n-type material is sandwiched between two p-type materials, then the transistor is

10 / 107

Photodiode is always connected in:

11 / 107

In photovoltaic cell, current is directly proportional to the:

12 / 107

The valve of potential barrier for silicon at room temperature is:

13 / 107

Conversion of only one half of an A.C. into D.C. is called:

14 / 107

In general most of the electrical circuits make use of:

15 / 107

In semi-conductor diode, p-type end is usually referred as:

16 / 107

By rectification process the current received across the load resistance R is:

17 / 107

When the p-n junction is forward biased, current flows through the junction due to

18 / 107

Depletion region charge carries:

19 / 107

Due to high value of the input resistance, practically, the value of the current which flows between the input terminals is:

20 / 107

When the p-n junction is forward biased its resistance is in:

21 / 107

The circuit which is used to smooth the output voltage of the full wave rectifier is known as:

22 / 107

During the negative half-cycle of the rectification process, the diode is said to behave as:

23 / 107

The process of converting an alternating current (A.C) into a direct current (D.C.) is known as:

24 / 107

Light emitting diodes (LED) are made from special semi-conductors such, as:

25 / 107

The current gain 'β' of a transistor for CF, -transistor is given by:

26 / 107

When the p-n junction is forward biased, current flows through it is of the order of:

27 / 107

NOR gate is used to invert the output of:

28 / 107

When we are using op-amp as comparator and V- > V+ then:

29 / 107

Whenever a p-n junction is formed, a chargeless region is formed around the junction, which is called as:

30 / 107

Digital system can be best carried if it is represented by binary digits:

31 / 107

The output of NAND gate isso when:

32 / 107

When the p-n junction is reverse biased, its resistance is of the order of:

33 / 107

In transistor, which one is very thin?

34 / 107

In forward biased start, a p-n junction offers:

35 / 107

The colour of light emitted by a LED depends on:

36 / 107

For normal operation of transistor, the battery:

37 / 107

The reverse current in a p-n junction flows due to:

38 / 107

A system which deals with quantities or variables which has two discrete values or states is called:

39 / 107

The resistance between Output terminal, and ground of the amplifier is known as:

40 / 107

The value of input resistance of op-amp is of the order of:

41 / 107

The fundamental equation for all transistor are:

42 / 107

A transistor is a combination of:

43 / 107

Transistors are made from:

44 / 107

Conversion of low AC voltage into high.AC voltage is called:

45 / 107

A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is called:

46 / 107

The voltage gain of an amplifier is written as:

47 / 107

LDR is abbreviated for:

48 / 107

p-n junction after some development can be used as:

49 / 107

Which one of the following is the most, important building block of any complex electronic circuit?

50 / 107

The gain G of op-amp, only depends upon:

51 / 107

In reverse biased stale an ideal p-n junction offers:

52 / 107

The open loop gain of the op-amp is:

53 / 107

Photodiodes can be used:

54 / 107

The SI unit of voltage gain is:

55 / 107

Which one of the following diode is used for detection of light?

56 / 107

The electronic circuits which implement the various logic operations are known as:

57 / 107

A diode characteristics curve is a plot between:

58 / 107

The output voltage of a rectifier is:

59 / 107

The branch of physics which deals with electrons and their controlled flow through various semi conductors devices is called:

60 / 107

In p-n junction if p-side is at positive potential and n-side is at negative potential, then this junction is said to be

61 / 107

When a p-n junction is reverse biased, the depletion region is:

62 / 107

The output of NOR gate is 1 when:

63 / 107

In a half wave rectifier, the diode conducts:

64 / 107

The central region of the transistor is known as:

65 / 107

Semi-conductor materials in periodic table are located in:

66 / 107

Photovoltaic panels are generally used in:

67 / 107

The value of current gain of n-p-n transistor is of the order of:

68 / 107

If reverse current of a reverse biased junction is increased. to a maximum value then:

69 / 107

Photovoltaic cell is formed from:

70 / 107

The output of AND gate will be one when:

71 / 107

A diode cannot be used as:

72 / 107

The potential difference setup across the depletion region is called:

73 / 107

In describing functions of digital systems, a OFF bulb will be described as:

74 / 107

The value of potential barrier (potential difference) for germanium (Ge) at room temperature is:

75 / 107

Which one of the following are called fundamental gates?

76 / 107

Transistor was discovered by:

77 / 107

Which one of the following gate is called inverter?

78 / 107

A transistor can be used-as a switch when:

79 / 107

An expression for open loop gain of an op-amp is given as:

80 / 107

The voltage gain of the common emitter n-p-n transistor as an amplifier is:

81 / 107

The gate which perform the operation of inversion or complementation is called:

82 / 107

Holes can exist in:

83 / 107

For the normal operation of transistor, the collector-base junction is always:

84 / 107

For the normal operation of transistor, the emitter base junction is always:

85 / 107

When op-amp is used as inverting amplifier, which of the input terminal is grounded:

86 / 107

A single silicon photovoltaic cell produces a small voltage of

87 / 107

Potential barrier in a diode:

88 / 107

In n-p-n transistor, the current flows in the direction from:

89 / 107

The integrated amplifier, which is used to perform mathematical operations electronically is known as:

90 / 107

Which component of the transistor has greater concentration of impurity?

91 / 107

The value of output resistance of op-amp is of the order of:

92 / 107

In full wave rectification:

93 / 107

The open loop gain of op-amp is of the order of:

94 / 107

When we are using op-amp as comparator and V- < V+ then:

95 / 107

When the p-n junction is reverse biased, current flows through it, is of the order of:

96 / 107

Rectification process needs:

97 / 107

Special algebra used in digital system is called:

98 / 107

The thickness of the base is of the order of:

99 / 107

Photovoltaic cell converts:

100 / 107

An op-amp can be used as a:

101 / 107

Gain of non-inverting amplifier is given by:

102 / 107

The output of an OR gate is 1 when:

103 / 107

If R1 = infinity and R2 = 0, then gain of non-inverting amplifier is:

104 / 107

Gain of an inverting amplifier is given by:

105 / 107

Automatic functioning of street lights can be done by the use of:

106 / 107

In p-n-p transistor, the current flows in the direction from:

107 / 107

Boolean algebra is based on which of the following operations:

Your score is

The average score is 38%

0%



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