Electronic Devices IQ Test Quiz Instructions:
Electronic Devices Quiz Test Questions and Options:
Determining rd to a high degree of accuracy from a characteristic curve is very accurate.
A(n) ________ is the simplest of semiconductor devices.
B: operational amplifier
Each diode in a center-tapped full-wave rectifier is ________ -biased and conducts for ________ of the input cycle.
A: reverse, 180º
B: forward, 90º
C: forward, 180º
D: reverse, 90º
For the "off" state of a Zener diode, the voltage across the diode should be ________.
A: less than VZ but greater than zero
C: greater than VZ
Typical values of voltage amplification for the common-base configurations vary from ________ and the current gain is always ________ .
A: less than 1, 50 to 300
B: 50 to 300, less than 1
C: 50 to 300, larger than 1
D: larger than 1, 50 to 300
For the BJT to operate in the saturation region, the base-emitter junction must be ________-biased and the base-collector junction must be ________-biased.
A: forward, reverse
B: reverse, reverse
C: reverse, forward
D: forward, forward
For R2 smaller than ________ k the voltage VD is equal to VDD = 16 V.
There is a ________º phase inversion between gate and source in a source follower.
Logarithms taken to the base ________ are referred to as common logarithms, while logarithms taken to the base ________ are referred to as natural logarithms.
A: 10, e
B: e, 10
C: 5, e
D: 10, 5
What is the level of the current through the amplifier input(s) to ground in an op-amp?
A: 2.8 mA
B: 1.7 mA
C: Virtually zero
D: 3.3 mA
When the input to the 311 voltage comparator is ________ value, the output is ________ if the inverting input is connected to ground.
A: any positive, high
B: any positive, low
C: any negative, low
An input signal is needed for an oscillator to start.
In an improved shunt regulator, which of the following components sets the reference voltage?
B: Transistor Q2
C: Transistor Q1
D: Zener diode
As the forward current through a silicon diode increases, the voltage across the diode:
B: decreases and then increases
C: increases to a 0.7 V maximum
D: is relatively constant
What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
The silicon material used in semiconductors is extremely pure with no additives.
Refer to the given figure. The most probable cause of trouble, if any, from these voltage measurements is:
A: RE is open
B: a short from collector to emitter
C: no problems
D: the base-emitter junction is open
A good op-amp has low voltage gain, low output impedance, and high input impedance.
Frequency modulation is achieved by varying the frequency of an oscillator with a modulating signal.
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: decreasing, increasing
C: increasing, increasing
D: increasing, decreasing
Recommended Other Related TopicsElectrical Engineering Online Exams MCQs Quiz Test
Software Engineering Online Exams MCQs Quiz Test
Electronics Engineering Online Exams MCQs Quiz Test
Engineering Mechanics Online Exams MCQs Quiz Test
Chemical Kinetics Online Exams MCQs Quiz Test
Chemical Engineering Online Exams MCQs Quiz Test
Digital Electronics Online Exams MCQs Quiz Test
Engineering Entrance Online Exams MCQs Quiz Test
Digital Logic Online Exams MCQs Quiz Test