MCQ in Electronic Circuits Part 2 | ECE Board Exam

This is the Multiple Choice Questions in Electronic Circuits (Electronic Devices and Circuits, Electronic Circuit Analysis and Design) Part 2 of the Series as one of the Electronics Engineering Examination topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

MCQ Topic Outline included in ECE Board Exam Syllabi

4. Electronic Devices and Circuits

• MCQ in Diode Wave Shaping Circuits and Special Diode Applications
• MCQ in BJT and FET Small Signal Analysis
• MCQ in Diode Equivalent Circuits
• MCQ in Voltage Multipliers, Power Supply, and Voltage Regulation
• MCQ in Bipolar Junction Transistor and FET

5. Electronic Circuit Analysis and Design

• MCQ in BJT and FET Frequency Response
• MCQ in Cascade and Cascode Connections
• MCQ in Current Mirrors and Current Source
• MCQ in Differential and Operational Amplifier
• MCQ in Feedback Systems, Oscillators, and Filters

Continue Practice Exam Test Questions Part 2 of the Series

⇐ MCQ in Electronic Circuits Part 1 | ECE Board Exam

Choose the letter of the best answer in each questions.

51. A type of oscillator wherein the frequency is determined by the charge and discharge of resistor-capacitor networks used in conjunction with amplifiers or similar devices.

A. Sine wave oscillator

B. Beta generating circuit

C. Relaxation oscillator

D. Simply an oscillator

52. The driver transformer has center- tapped secondary to provide

A. Forward bias to transistors of push-pull circuit

B. Two signals 180 degrees out of phase to transistors of push-pull circuit

C. Impedance matching

D. Two signals in phase with each other

53. What is the advantage of RC coupling scheme?

A. Good impedance matching

B. Economy

C. High efficiency

D. Simplicity

54. A type of filter which is having a single continuous transmission band with neither the upper nor the lower cut-off frequencies being zero or infinite is called

A. Band stop filter

B. Low pass filter

C. High pass filter

D. Band pass filter

55. An instrument use to measure ones location in terms of coordinates

A. GPS

B. ILS

C. FANS

D. GSM

56. Transformer coupling is used for _________ amplification.

A. Current

B. Power

C. Voltage

D. Signal

57. What is the typical value of coupling capacitor Cc in RC coupling?

A. About 100 pF

B. About 0.1 µF

C. About 10 µF

D. About 0.01 µF

58. An electronic transfer from one stage to the next is termed as ____________.

A. Doping

B. Mixing

C. Coupling

D. Connecting

59. An amplifier configuration where the input signal is led to the emitter terminal and the output from the collector terminal is called

A. Common base

B. Common emitter

C. Clipper

D. Common collector

60. If the noise factor of an ideal amplifier expressed in dB, then it is

A. 0

B. 0.1

C. 1

D. 10

61. A feedback circuit is ______________ frequency

A. Independent of

B. Strongly dependent on

C. Moderately dependent on

D. Relatively dependent on

62. What is the basic purpose of applying negative feedback to an amplifier?

A. To increase gain

B. To reduce distortion

C. To keep the temperature within limits

D. To increase input signal

63. The capacitors are considered ________________ in the dc equivalent circuit of a transistor amplifier.

A. Short

B. Partially short

C. Open

D. Partially open

64. Which frequency produces the highest noise factor?

A. 10 kHz

B. 500 Hz

C. 1 kHz

D. 100 Hz

65. Power amplifiers handle _____________ signals.

A. Very small

B. Small

C. Large

D. Very large

66. The operating point is generally located at ______________ of dc load line in class A operation

A. The middle

B. Saturation point

C. Cut off point

D. End point

67. Which of the following describes a common collector amplifier?

A. Low voltage gain

B. Low current gain

C. Low power gain

D. Low input resistance

68. The general characteristics of a common base amplifier are

A. High voltage gain, low current gain, high power gain and very low input resistance

B. High voltage, high current gain, high power gain and low input resistance

C. Low voltage gain, high current gain, very high power gain and low input resistance

D. None of the choices

69. To amplify dc signals, multistage amplifier uses what coupling?

A. RC

B. Direct

C. Transformer

D. Resistor

70. What oscillator is used on order to produce frequencies in the microwave region?

A. Wien bridge

B. Hartley

C. Klystron

D. Crystal

71. Practically, the voltage gain of an amplifier is expressed

A. In volts unit

B. In dB unit

C. As an absolute value

D. As a whole number

72. What coupling provides maximum voltage gain?

A. RC

B. Direct

C. Transformer

D. Resistor

73. The gain of an amplifier __________ when negative feedback is added.

A. Increases

B. Remains unchanged

C. Reduces

D. Becomes infinite

74. Feedback factor is always

A. Less than 1

B. Equal to 1

C. More than 1

D. Zero

75. What class of operation is used for general amplification where no distortion can be tolerated?

A. Class A

B. Class B

C. Class AB

D. Class C

76. What class of operation is used either where the signal needs to be cut in half, such as in pulse detector or noise detectors or where push-pull operation of two stages is required?

A. Class A

B. Class B

C. Class AB

D. Class C

77. What class of operation is used where a portion of a signal only is required, such as the synchronizing pulse separator of a television receiver?

A. Class A

B. Class B

C. Class AB

D. Class C

78. What class of operation has little use in general purpose amplifiers, but is used in high frequency oscillators?

A. Class A

B. Class AB

C. Class B

D. Class C

79. Why is transformer coupling provides high frequency?

A. DC resistance is low

B. Collector voltage is stepped up

C. Collector voltage is stepped down

D. AC resistance is high

80. For constant- K high-pass filter cut-off frequency (in Hz) is given by

A.

B.

C.

D.

81. Class C operation can have _____________ percent efficiency.

A. 100%

B. 78.5%

C. 50%

D. 70%

82. The efficiency of class AB operation has a maximum of between _____________ percent.

A. 90 to 100%

B. 60 to 80%

C. 50 to 78.5%

D. 40.5 to 60%

83. Transformer coupling is generally employed when load resistance is

A. Large

B. Very large

C. Small

D. Zero

84. A dc voltage supply provides 60V when the output is unloaded. When connected to a load the output drops to 56V. Calculate the value of the voltage regulation.

A. 8.1%

B. 7.1%

C. 5%

D. 12%

85. The __________ the voltage regulation, the better the operation of the voltage supply circuit.

A. Smaller

B. Bigger

C. Moderate

D. Biggest

86. In transistor amplifiers, what transformer is used for impedance matching?

A. Step up

B. Power

C. Step down

D. Isolation

87. If an amplifier has a power gain of 100, then its dB gain is

A. 10

B. 40

C. 20

D. 100

88. In order to have more voltage gain from a transformer amplifier the transistor used should have

A. Thin collector

B. Thin base

C. Wide emitter

D. Thin emitter

89. The final stage of an amplifier uses ____________ coupling.

A. Direct

B. RC

C. Transformer

D. Impedance

90. The largest theoretical voltage gain obtained with a common collector amplifier is

A. 100

B. 10

C. Unity

D. Infinite

91. Increasing the overall Beta is an advantage of

A. Clap oscillator

B. Crystal oscillator

C. Darlington pair

D. CE amplifier

92. The frequency of oscillation is __________ L and C in an LC oscillator.

A. Inversely proportional to square root of

B. Directly proportional to

C. Independent of the values of

D. Proportional to square of

93. An oscillator employs ____________ feedback.

A. Positive

B. Negative

C. Both positive and negative

D. Neither positive nor negative

94. What is the reason why RC coupling is not used to amplify extremely low frequencies?

A. There is considerable power loss

B. Electrical size of coupling capacitor becomes very large

C. There is a hum in the output

D. Electrical size of coupling capacitor becomes very small

95. Given three amplifiers with a gain of 10 and are connected in cascade. How much is the overall gain?

A. 24

B. 10,000

C. 30

D. 20

96. A pair of filter common on high fidelity system which separate audio frequency band signals into two separate groups, where one is fed to the tweeter and the other to the woofer is called

A. Equalizer

B. Synthesizer

C. Cross over network

D. Hybrid

97. The frequency response of transformer coupling is

A. Good

B. Excellent

C. Poor

D. Very good

98. The simplest variable frequency sinusoidal oscillator is the

A. Complicated Colpitts circuit

B. Crystal circuit

C. Armstrong circuit

D. Phase shift circuit

99. Which of the following is provided by a CB transistor amplifier?

A. Voltage gain

B. Power gain

C. Current gain

D. Gain stability

100. In the initial stages of a multistage amplifier, ____________ coupling is used.

A. Link

B. RC

C. Transformer

D. Impedance

Questions and Answers in Electronic Circuits

Following is the list of practice exam test questions in this brand new series:

Complete List of MCQ in Electronics Engineering per topic