EXIT SHIT
A proximity sensor that operates under the principle of Faradays Law of Inductance
Inductive sensor
Optical sensor
Capacitive sensor
Magnetic sensor
Why do most op-amps use a commoncollector at the output stage?
To have a better frequency response
To have a very low output resistance
To have a low harmonic distortion
To have a higher output power
Why do FETs offer high input resistance than BJTs?
Due to the level of doping
Because of the materials used
Because of the way FETS are constructed.
Due to the reverse-biased input circuit of FETs.
Normally, diodes will not conduct when reverse-biased, but if the reverse voltage is increased further, a point will be reached where the diode gives up and allowing the current to surge. This voltage is one of the limiting parameter of diodes is known as
peak reverse voltage (PRV)
Peak inverse voltage (PIV)
breakdown voltage (Vbr)
All are correct
An operational amplifier has a commonmode voltage gain of 10 and a differential-mode voltage gain of 20,000. Calculate the CMRR.
20,000
200
2,000
200,000
What gain is significant when an op-amp is used as a voltage comparator?
closed loop gain
Differential closed loop gain
open-loop gain
common gain
A good op-amp has a
very low CMRR
Very high output resistance
Very low input resistance
Very high input resistance
When emitter current increase, internal resistance RB2 of UJT Select one:
Decreases
remains unchanged
Increases
is zero
Two Class B amplifier connected such that one amplifies the positive cycle and the other ampifies the remaining negative cycle. Both output signals are then coupled by a transformer to the load. Select one:
quasi-complementary push-pull amplifier
transformer-coupled class A amplifier
complementary-symmetry amplifier
transformer coupled push-pull amplifier
The thyristor counterpart of the valley current (IV)
Switching Current (Is)
Holding Current (IH)
Peak Current (Ip)
Anode Current (IA)
Common-base configuration has a high voltage gain and a current gain of
Low
High
Moderate
Approximately equal to one (1)
What will happen to the barrier potential of the diode when it operates at higher temperatures?
increase
decrease
Decreases exponentially
Increases exponentially
Ideally, op-amps have infinite input resistance and ____ output resistance.
Infinite
Variable
Zero
a highly stabilized
The name of pure semiconductor material that has an equal number of electrons and holes
Pure type
N-type
Intrinsic
P-type
Calculate the output offset voltage of an inverting amplifier using an op-amp with an input offset current of 10nA. The circuit has an input resistance of 10 kilo ohms and a feedback resistance of 100 kilo ohms.
100.0mV
10.0mV
0.1mV
1.0mV
At cut-off region, the collector-base and base-emitter junctions of a transistor are
Forward and reverse-biased
Reversed and forward-biased
both forward-biased
both reverse-biased
When one-input of the op-amp is connected to ground and the other to the signal source, its operation is called
double-ended output
Single-ended input
Single-ended output
Double-ended input
A diac is simply
a triac without gate terminal
a three junction device
A single junction device
none of the above
The maximum rate of change of output voltage per unit of time of an op-amp.
Differential rate
Slew rate
maximum voltage swing
rise time
Find the line regulation of a regulator when full-load voltage is 110 V and noload voltage is 120.
None of these
9.09%
8.33%
91.7%
The term bias means
the amount of current across a diode
a dc voltage is applied to control the operation of a device
None of these
The ratio of majority carriers to minority carriers
Among the three characteristics of a transistor amplifier, which region is normally employed for linear(undistorted) amplifiers?
Active region
Saturation region
Breakdown region
Cutoff region
A UJT, with stand-off ratio of 0.63, is connected to a 20 V supply. Compute for the voltage at RB1
2V
13V
12.6V
12V
An example of elemental semiconductor
Gallium Phosphide (GaP)
Germanium (Ge)
Gallium Arsenide (GaAs)
Aluminum Arsenide (AlAs)
A network with a diode and a capacitor that is used to shift the dc-level of the input signal.
Clamper
Peak detector
Level shifter
clipper
The reduction of op-amp's gain due to increasing operating frequency.
reduction step
diminishing factor
Roll-off
Cutoff
Monostable multivibrator is also known as
direct shot
One shot or single shot
Single shot
d. One shot
Ideal op-amps requires no input current, but real op-amps needs a very small input current called input bias current. At both inputs, the bias currents have a slight difference. What do you call this difference?
differential input current
Input offset current
Differential bias
Input offset difference
The simplest incremental encoder
absolute position encoder
Potentiometer
Tachometer
Doppler-effect sensors
When an op-amp is used as a comparator, the output voltage would be +Vsat if
V- = V+
V+ > V-
V- > V+
V- and V+ are both zero
A unity-gain summing amplifier has three inputs, V1=1.0mV, V2=1.5mV, and V3=2.5mV. Calculate the total output voltage.
1mV
3.5mV
4.0mV
5.0mV
Current flow in a semiconductor that is due to the applied electric field.
Diffusion current
Drift current
Conventional current
Drift velocity
The electron flow in a semiconductor material is
The same direction with hole flow
The drift curren
Known as the conventional current
Opposite in direction of hole flow
The non-inverting and inverting inputs of an op-amp have an input voltage of 1.5mV and 1.0mV, respectively. If the opamp has a common-mode voltage gain of 10 and a differential-mode gain of 10,000, what is its output voltage?
5.0V
5.0125mV
5.0125V
25.0125V
Any thyristor can be turned off with
all of the above
Negative Gate triggering
Reverse-bias gate triggering
Low-current drop out
The term ___ reflects the fact that holes and electrons participate in the injection process into the oppositely polarized material.
unipolar
Bipolar
tetrode
Pentode
A photovoltaic transducer converts
solar energy into electrical energy
light energy into current
light energy into voltage
Light energy into variable resistance
Which of the following is not a characteristic of the UJT?
peak-point voltage
intrinsic stand off ratio
bilateral conduction
negative resistance
The feedback element of a differentiator constructed from an op-amp is
An inductor
a resistor
An RC network
A capacitor
In the active region, the collector-base junction is ____, while the base-emitter junction is ____ biased.
Reverse, forward
forward, reverse
forward, forward
reverse, reverse
Which condition must exist for a circuit to oscillate?
it must be neutralized
It must have a gain of less than 1
it must have a negative feedback sufficient to cancel the input
it must have a positive feedback sufficient to overcome losses
{"name":"EXIT SHIT", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"Which thyristor conducts current in both directions when turned on?, A proximity sensor that operates under the principle of Faradays Law of Inductance, Why do most op-amps use a commoncollector at the output stage?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}
More Surveys
EDFX242 - Assignment 1 Part B
5223
TTS 100k Members Celebration Feedback
12625
Who is your best friend in the group chat?
16829
Gender and Sex Poll
1050
Va multumim ca ati ales Optica Iris. Deoarece pentru noi conteaza parerea dvs. Si dorim sa ne imbunatatim calitatea serviciilor, va rugam sa ne ajutati completand urmatorul chestionar.
8419
Scavenger Hunt
6331
Friendships and Relationships
10525
Social Anthro: Gender Roles
6344