Electronic Devices MCQs
Electronic Devices MCQs
The following Electronic Devices MCQs have been compiled by our experts through research, in order to test your knowledge of the subject of Electronic Devices. We encourage you to answer these multiple-choice questions to assess your proficiency.
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1: The common-gate configuration has extremely high input resistance.
A. False
B. True
2: The silicon material used in semiconductors is extremely pure with no additives.
A. True
B. False
3: For a full-wave rectifier with ac ripple at 120 Hz, the impedance of a capacitor can be calculated using XC = ________.
A. 1.414 ÷ C
B. 0.785 ÷ C
C. 1.3 ÷ C
D. 0.707 ÷ C
4: For a given input frequency, a half-wave rectifier is easier to filter than a full-wave rectifier.
A. True
B. False
5: In a half-wave variable-resistance phase control operation, the control cannot be extended past a ________ phase displacement.
A. 180º
B. 90º
C. 45º
D. 135º
6: The ratio of the unity-gain frequency to the cutoff frequency is numerically equal to the level of ________.
A. Common-mode gain
B. CMRR
C. Closed-loop gain
D. Open-loop gain
7: In what decade was the first transistor created?
A. 1950s
B. 1930s
C. 1940s
D. 1960s
8: In n-type material the ________ is called the majority carrier.
A. Electron
B. Hole
C. Neutron
D. Proton
9: The start-up gain of an oscillator must be ________ one.
A. Greater than
B. Less than
C. Equal to
D. None
10: A good op-amp has low voltage gain, low output impedance, and high input impedance.
A. True
B. False
11: Which of the following materials is (are) used in the manufacturing of thermistors?
A. Ge
B. All
C. A mixture of oxides of cobalt, nickel, strontium, or manganese
D. Si
12: The lower doping level ________ the conductivity and ________ the resistivity of the material.
A. Increases, increases
B. Decreases, increases
C. Increases, decreases
D. Decreases, decreases
13: In an improved shunt regulator, which of the following components sets the reference voltage?
A. RS
B. Zener diode
C. Transistor Q1
D. Transistor Q2
14: The output impedance of a voltage buffer is ________.
A. Very low
B. Very high
C. High
D. Low
15: A(n) ________ is the simplest of semiconductor devices.
A. Operational amplifier
B. SCR
C. Transistor
D. Diode
16: As the forward current through a silicon diode increases, the voltage across the diode:
A. Decreases and then increases
B. Is relatively constant
C. Decreases
D. Increases to a 0.7 V maximum
17: The output frequency of a full-wave rectifier is ________ the input frequency.
A. One-quarter
B. One-half
C. Twice
D. Equal to
18: In the operation of a half-wave rectifier with a capacitor-input filter, the ripple factor can be lowered by ________ the value of the filter capacitor or ________ the load resistors.
A. Decreasing, decreasing
B. Increasing, decreasing
C. Increasing, increasing
D. Decreasing, increasing
19: A reverse-biased silicon diode has about 0.7 V across it.
A. False
B. True
20: Consumers prefer mobile commerce sites ________.
A. That have many low price items on sale
B. That are convenient and efficient to use
C. That are linked to the consumers' banks
D. That belong to traditional stores like Wal-mart or Best Buy
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Electronic Devices MCQs
