WorksheetsReview ANalog devices and circuits
Total questions: 65
Worksheet time: 44mins
In a basic AC/DC power supply circuit, the ____ can be used to filter the frequency components from the rectifier.
AC source
Resistive load
conductor
Capacitor
In an AC/DC power supply the 5 volts regulator of the serial 78 is coded with the number _____
7815
7812
7805
A ____ permits frequencies above the cut-off point to pass while attenuating frequencies below the cut-off point.
Low pass filter
High pass filter
RLC filter
A ____ allows the values under the cut off frequency, while blocking frequencies above it cut off frequency.
Low pass filter
High pass filter
RLC filter
The inductive reactance in an AC circuit is ____ proportional to the applied voltage and ____ proportional to the current.
Directly// Directly
Inversely//Directly
Directly//Inversely
When inductors are connected in series, the inductive reactance is equal to the ____.
product of the individual inductive reactance values
sum of the individual inductive reactance values
sum of the reciprocals of the individual inductive reactance values
When inductors are connected in parallel, the inductive reactance is equal to the ____.
product of the individual inductive reactance values
sum of the individual inductive reactance values
sum of the reciprocals of the individual inductive reactance values
In a (n) ____ the turn’s ratio is always less than one.
Step up transformer
Step down transformer
Autotransformer
In N-type material, ____ are the majority carrier and ____ are the minority carrier.
Electrons// holes
Holes// electrons
Holes///Holes
The _____ is made by putting two different types of semiconductors together one P and one N.
Transistor
Diode
Resistor
In P-type material, ____ are the majority carrier and ____ are the minority carrier.
Electrons// holes
Holes// electrons
Holes///Holes
The main parts of the diode rectifier are _______
Base// Emitter// Collector
Anode//Cathode
Positive//Negative
Current flow occurs only if the external voltage is ____ the barrier voltage
More than
Less than
Equal to
If the ____ is exceeded, a large reverse current flows, creating excess heat and damaging the diode.
Reverse voltage
Forward voltage
Peak inverse voltage
If a diode shows both low forward and low reverse resistance, it is probably ____.
Openned
Shorted
Silicon
The ____ in the ohmmeter is the source of the forward- and reverse-bias voltage.
Battery
Conductor
Resistor
The _______ transformer the voltage ratio will be always higher than 1
Step up
Step down
Auto-transformer
In the ____ configuration of transistors the emitter is grounded
Common emitter
Common base
Common collector
The basic ____ rectifier circuit requires two diodes and a center-tapped transformer
Half wave
Full wave
Filter
The diodes in half-wave and full-wave rectifiers should be operated at ____ of their rated value to allow for changes in the input voltage.
40 %
80 %
50 %
Circuits that are capable of producing higher DC voltages without the benefit of a transformer are called ____.
Voltage divider
Voltage multiplier
Peak voltage
The _____ of the computer PSU is used to feed the mother board with 3.3, 5 and 12 volts.
Main connector
pins connector
Ground connector
In the computer PSU the ______ wire supply the computer with 12 volts.
Red
Yellow
Orange
In the computer PSU the ______ wire supply the computer with 5 volts
Red
Yellow
Blue
____ Amplifiers amplify AC signals in the frequency range of approximately 20 to 20,000 hertz.
Audio
RF
DC
____ Amplifiers are designed to drive specific loads and are rated in watts.
Power
Radio-frequency
Voltage
The _______________________________ is a type of amplifier that amplifies the difference between its inputs.
Differential amplifier
Power amplifier
Video amplifier
A basic AC circuit consists of an AC source, conductors and ____________________
Resistive load
Resistor
In an AC circuit, a capacitor is an effective way of controlling (a) .
Capacitors can be used alone or combined with resistors to form (a) networks.
The opposition offered to current flow by an inductor in an AC circuit is called (a) .
In a transformer, the coil containing the output voltage is referred to as the (a) .
(a) materials have characteristics that fall between those of insulators and conductors.
The process of injecting electrons to a semiconductor material is also known as (a) .
The process of injecting protons to a semiconductor material is also known as (a) .
In a properly biased transistor, the (a) is forward biased and the collector junction is reverse biased.
There are two methods for checking a transistor to determine if it is functioning properly: with a (n) (a) and with a transistor tester.
(a) is an electronic element use to amplify weak signals.
(a) are constructed in two ways. One method is as a simple PN junction. The other method inserts an intrinsic (undoped) layer between the P and N region.
A (n) (a) is used like a photodiode and packaged like a photodiode, except that it has three leads (emitter, base, and collector).
The (a) converts the AC voltage to a smooth DC voltage.
(a) are electronic circuits that are used to increase the amplitude of an electronic signal.
In a (n) (a) circuit, the output voltage comes from the emitter of the transistor.
The (a) configuration of transistors is used as regulation circuit in power supplies.
(a) is the ability of an electronic circuit to increase the amplitude of an electronic signal.
Audio amplifiers are divided into two categories: (a) amplifiers and power amplifiers.
(a) is the condition when a device creates too large a load and severely affects the output by drawing too much current.
Is a pure AC circuit in which the voltage and current oscillate in the same phase.
(a)
I s a pure AC circuit in which the current leads the voltage in 90 degrees.
(a)
What type of op-amp is represented in the diagram?
Inverting
Non inverting
Buffer
in the diagram represented below the output voltage is...
24 V
12 V`
20 V
The non - inverting input of the op-amp has as majority charge carrier...
Protons
Electrons
Neutrons
The inverting input of the op-amp has as majority charge carrier...
Protons
Electrons
Neutrons
The two legs of the diode are ________________ and _______________
(a)
The voltage found in the depletion zone of a diode is...
(a)
Identify the circuit that (A) represents from the block diagram shown
Rectifier circuit
Regulator Circuit
Transformer Circuit
Filter Circuit
After the full wave rectification in the power supply about the _____ of the voltage is rectified.
80 %
40 %
60 %
Is the section used to eliminate the AC components after the rectification.
circuit of filter
Rectifier
Regulation circuit
The diode bridge is composed by ______ diodes.
4
2
1
In the AC/DC power supply with a 7812 voltage regulator the voltage supplied to the load is...
3 V
24 V
12 V
Resistance of photoresistor sensor is low in brightness
True
False
The photosensitive element used in solar panel is (a)
In the phototransistor the parts that is light sensitive is (a)
The electrical circuit or device used to convert AC to pulsing DC is also called
Rectifier
Modulator
Inverter
The electrical circuit or device used to convert DC to AC is also called
Rectifier
Modulator
Inverter
