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Analog Electronics Questions and Answers

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This article lists 100 Analog Electronics MCQs for engineering students. All the Analog Electronics Questions & Answers given below includes solution and link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Analog Electronics topic which is core in Electronics Engineering.

Conductive materials are classified into 3 types namely insulators, semiconductors, and conductors. An insulator offers low conductivity, some of the examples of an insulator are wood, oil. Whereas a semiconductor offers conductivity between an insulator and conductor. Examples of semiconductors are diodes, switches, transistors. A conductor offers maximum conductivity like copper wire, water. Semiconductors are further classified into 2 types namely, intrinsic type semiconductor and extrinsic type semiconductor.

In analog electronics, there are two types of components active components like voltage resources, current resources, etc, and passive components like resistors, capacitors, inductors, etc.  The main advantage of analog electronics is that provide accurate output, are more flexible, low cost, and are easily portable.

1). Analog electronics is __________ signal.
HintAnalog electronics is a Continuous variable signal.
2). Analog communication gives a relationship between _________.
HintAnalog communication gives the relationship between Signal and voltage or current of a signal.
3). Analog is derived from ___________.
HintThe word analog is derived from the Greek word.
4). The information in electric signals represented by changing its _________ form.
HintThe information in electric signals represented by changing its voltage, frequency, current form.
5). What is the function of the transducer?
HintA transducer converts one form of signal to another form.
Read more about Transducer.
6). Which of the following is an example of a transducer?
HintExamples of a transducer are Microphone, Amplifier, ADC.
7). What is the function of an amplifier?
HintAn amplifier amplifies the low-frequency signal to high-frequency signal.
Read more about Amplifier.
8). What is the full form of ADC?
HintADC stands for Analogue to digital converter.
9). What is the full form of DAC?
HintDAC stands for digital to analog converter.
10). Digital Signals are represented in __________ form.
HintIn electronics, signals are represented in 0’s and 1’s forms.
11). Analog signal has ___________number of modulation techniques.
HintAnalog signal has 3 modulation techniques, namely, AM – amplitude modulation, FM – frequency modulation, PM - Phase modulation.
12). Analog circuits are classified into how many types?
HintAnalog circuits are classified into active and passive elements.
13). Which of the following is an active elements in analog electronics?
HintA transistor is an active element in analog electronics.
Read more about Transistors.
14). Which of the following is a passive element in analog electronics?
HintPassive elements in analog electronics are resistors, capacitors, inductors.
15). Which of the following is a unit of resistor?
HintThe units of the resistor are Ohms.
16). A resistor has _________ number of terminals?
HintA resistor has two terminals, a positive terminal (anode) and a negative terminal (cathode).
17). Which of the following is the function of a resistor?
HintThe function of the resistor is to oppose the flow of current, it is also known as a dielectric component.
18). What are the units of a capacitor?
HintThe units of a capacitor are farad.
19). Which of the following is the function of a capacitor?
HintThe function of a capacitor is to store charge, it is also called a battery.
20). What is the other name for a resistor?
HintA resistor is also known as a diode or switch.
Read more about Diodes.
21). A switch can operate in _________ states.
HintA switch can operate in any of two states, in ON state allowing the current to flow and in OFF state which does not allow the current to flow.
22). Ohm’s law is given by ____________ equation.
HintOhm’s law is given by V = IR, where V is voltage, I = current, R = resistance.
23). Resistors can be connected in _________ ways.
HintA resistor can be connected either in series or in parallel connection in a circuit.
24). Which of the following statement is true for a transistor?
HintA transistor is a semiconductor device, which acts as a switch and also it amplifies electric signals.
25). How many terminals do a basic transistor have?
HintA basic transistor has 3 terminals namely, emitter (E), base (B), collector (C).

Analog Electronics Interview Questions & Answers

26). What does CEC in transistor stands for?
HintCEC stands for Common emitter configuration. Where the Emitter terminal of a transistor is grounded.
27). What does CBC in transistor stand for?
HintCBC stands for Common base configuration, where the base terminal of a transistor is grounded.
28). What does CCC in transistor stand for?
HintCCC stands for Common collector configuration, where the collector terminal of a transistor is grounded.
29). How types of configuration are there in a transistor?
HintThere are 3 types of configuration in a transistor, CBC – Common base configuration, CCC – common collector configuration, CEC – common-emitter configuration.
30). Which of the following are the advantages of analog electronics?
HintThe advantages of analog electronics are Consumes less bandwidth, Cost is low, Time-varying.
31). Analog signal is represented in ___________ waveform.
HintAnalog signal is represented in sine waveform.
32). Which of the following are examples of analog signals?
HintExamples of analog signals Temperature sensor, FM  radio signals, Photocells.
33). Analog signals _________ by noise.
HintAnalog signals deteriorate by noise.
34). Does analog hardware offer flexible implementation?
HintAnalog hardware does not offer a flexible implementation.
35). Analog signals offer ________ range.
HintAnalog signals offer’s a variable set of ranges.
36). Which of the following are the advantages of analog signals?
HintThe advantages of analog signals are the output data obtained is of high accuracy, and it provides more flexibility to use.
37). Which of the following are the disadvantages of analog components?
HintThe disadvantages of analog components are Expensive, Occupies more space, Parallax error
38). What is the maximum efficiency of a CB amplifier?
HintThe maximum efficiency of the CB amplifier is 25%.
39). Which component is used in an analog circuit to prevent any short circuit or damage when there is high current or voltage fluctuation in the circuit?
HintIn an analog circuit, Capacitor is used to prevent any short circuit or damage when there is a high current or voltage fluctuation in the circuit.
40). Which of the following factor is responsible for transistor current leakage?
HintThe temperature parameter is responsible for transistor current leakage.
41). Op-amp stands for __________.
HintOp-amp stands for Operational amplifier.
42). Op-amp is a __________ coupled amplifier.
HintOp-amp is a DC-coupled amplifier.
43). Op-Amp was invented by _______ in ________ year.
HintOp-Amp was invented by Karl D. Swartzel Jr in the 1967 year.
44). Resistor was invented by _____ in _____ year.
HintThe resistor was invented by Karl Otis Frank Boykin in the year 1920.
45). Capacitor was invented by _____ in _____ year.
HintThe capacitor was invented by Ewald George in the year 1745.
Read more about Capacitor.
46). Which of the following is the application of a capacitor?
HintThe application of a capacitor is Memory storage, Power storage, Power factor corrector.
47). Which of the following are classifications of capacitors?
HintCapacitors are classified into different types based on their properties namely Electrolytic capacitor, Paper capacitor, Ceramic capacitor.
48). Which of the following are different types of resistors?
HintThe different types of resistors are Thermistor, Varistor, and Variable resistor.
49). Which of the following statement is true regarding the oscillator?
HintAn oscillator is an electronic device, which generates periodic signals in sinewave or square waveform.
50). Which of the following are the applications of an oscillator?
HintOscillators are used in Quartz crystal, TV, metal detectors. These devices generate periodic clock signals in the sinusoidal or square waveform.

Analog Electronics Exam Questions & Answers

51). The diode is a _______.
HintThe diode has two terminals they are anode and cathode that allows the current flow only in one direction
52). What are diode terminals?
HintThe one terminal of the diode is the anode and another terminal is the cathode, whether the diode will allow the current flow or not depends upon the polarity of the voltage
53). In terms of conductivity the materials are classified into ______.
HintIn terms of conductivity the materials are classified into three types they are conductor, semiconductor, and insulator
54). In a semiconductor the flow of current is due to ________.
HintIn a semiconductor, the flow of current is due to electrons and holes but in a conductor, the flow of current is only due to electrons
55). Which is the example for trivalent atoms?
HintAluminum, boron, gallium are examples of trivalent atoms.
56). Which is the example for pentavalent atoms?
HintArsenic, antimony, and phosphorous are examples of pentavalent atoms.
57). In the case of P-type semiconductor the ________ are the majority carriers.
HintIn P-type semiconductor, the holes are the majority carriers and electrons are the minority carriers
Read more about P-Type Semiconductor.
58). The phase lock loop is used in __________.
HintThe phase lock loops are widely used in many electronic applications like synchronization and demodulation circuits, clock recovery, frequency synthesizers, etc.
59). In phase lock loop ______ is used as phase detector.
HintThe radiofrequency applications such as XOR gate, phase frequency detector, and the balanced mixture can also be used as a phase detector
60). In the conventional oscillator the frequency of oscillation can be selected by _________.
HintIn the conventional oscillator, the frequency of oscillation can be selected by passive elements like a resistor, capacitor, and inductor.
61). Which oscillator comes under harmonic oscillator?
HintThe crystal oscillator, RC, and LC oscillators are types of harmonic oscillators.
62). In RC oscillator the frequency is directly proportional to ______.
HintIn RC oscillator the frequency is directly proportional to one by the square root of RC.
Read more about RC Oscillator.
63). The process of converting the AC voltage signal into the DC voltage signal is called _____.
HintThe process of converting the AC voltage signal into the DC voltage signal is called rectification.
64). In a conductor the flow of current is due to ________.
HintIn a conductor, the flow of current is due to only electrons but in a semiconductor, the flow of current is due to electrons and holes.
65). In the case of N-type semiconductor the ________ are the majority carriers.
HintIn N-type semiconductor, the electrons are the majority carriers and holes are the minority carriers
Read more about N-Type Semiconductor.
66). In LC oscillator the frequency is directly proportional to _____.
HintIn the LC oscillator, the frequency is directly proportional to one by the square root of LC.
67). Whenever the sin wave is applied as input to the half wave rectifier then the rectifier allows ________.
HintWhenever the sin wave is applied as input to the half-wave rectifier then the rectifier allows only positive half cycle or negative half cycle.
68). The efficiency in half wave rectifier is around _______.
HintThe efficiency in the half-wave rectifier is around 40.6%, which means that from the given input power only 40.6% of power is getting converted into DC power.
Read more about Half Wave Rectifier.
69). The average value or DC value of the half wave rectifier is expressed as______.
HintThe average value or DC value of the half-wave rectifier is expressed as vm/π, where VM is the peak value of the input signal.
70). Which material is the example of an insulator?
HintThe mica used for thermal and electrical equipment and wood is one of the insulator materials whereas copper is the conductor material.
71). The average value or DC value of the full wave rectifier is expressed as______.
HintThe average value or DC value of the full-wave rectifier is expressed as 2vm/π, where VM is the peak value of the input signal.
72). The peak to peak ripple voltage in full wave rectifier is given by ______.
HintThe peak to peak ripple voltage in full-wave rectifier is given by V r(p-p) =vm/2fR LC, where V r(p-p) is peak to peak ripple voltage, f is the frequency of the input signal.
73). The peak to peak ripple voltage of full wave rectifier in terms of DC is given by ______.
HintThe peak to peak ripple voltage of the full-wave rectifier in terms of dc current is given by V r(p-p) =I dc /2fC.
74). The efficiency in full wave rectifier is around _______.
HintThe efficiency in the full-wave rectifier is around 81.2%, which means that from the given input power only 81.2% of power is getting converted into DC power.
Read more about Full Wave Rectifier.
75). ________ is a material that offers very low conductivity when voltage is applied.
HintAn insulator is a material that offers very low conductivity when voltage is applied.

Analog Electronics MCQs with Answers

76). The change in the output frequency with the change in the supply voltage is known as _____.
HintThe change in the output frequency with the change in the supply voltage is known as supply pushing, the unit of the supply pushing is Hz/V.
77). The change in the output frequency with the change in the load minimum deviation from the nominal frequency is known as _____.
HintThe change in the output frequency with the change in the load minimum deviation from the nominal frequency is known as load pulling.
78). The unit of the conductivity is ______.
HintThe unit of the conductivity is siemens/meter.
79). Which material is the example of the conductor?
HintCopper is the example of a conductor whereas mica, wood is the insulator material.
80). ________ is a material that has conductivity more than insulators but less than conductors.
HintThe semiconductor is a material that has conductivity more than insulators but less than conductors.
81). Semiconductors are classified into _____ types.
HintSemiconductors are classified into 2 types namely intrinsic type sem conductor and extrinsic type semiconductor.
82). Extrinsic type semiconductors are classified into _____ types.
HintExtrinsic type semiconductors are classified into 2 types namely P-type and N-type.
83). Which of the following are examples of intrinsic semiconductor?
HintSi and Ge are examples of intrinsic semiconductors.
84). How many atoms of impurities are added to extrinsic type semiconductor?
Hint1 part in 10 power6 atoms are impurity is added in extrinsic type semiconductor.
85). The impurity added in N-type semiconductor is ______.
HintPentavalent elements like Ge, Si impurity added in N-type semiconductor.
86). The impurity added in P-type semiconductor is _________.
HintTrivalent impurities like Ga, Li are added in P-type semiconductors.
87). The positive and negative terminals of a diode is connected to _____ terminals of the power  source in reverse bias diode.
HintThe positive and negative terminals of a diode are connected to negative and positive terminals of the power source in forward bias diode.
88). The positive and negative terminals of a diode is connected to _______ terminals of power a source in forward bias diode.
HintThe positive and negative terminals of a diode are connected to positive and negative terminals of the power source in forward bias diode.
89). Which bias has a maximum charge barrier?
HintReverse bias has a maximum charge barrier.
90). Which bias has a minimum charge barrier?
HintForward bias has a maximum charge barrier.
91). Charge carrier is represented by _________.
HintCharge carrier is represented by Q.
92). Which of the following are the units of charge?
HintThe units of charge coulomb.
93). Voltmeter is used to measure ______ in an electric circuit.
HintA voltmeter is used to measure voltage in an electric circuit.
94). Ammeter is used to measure ______ in an electric circuit.
HintAn ammeter is used to measure current in an electric circuit.
95). Multimeter is used to measure ______ in an electric circuit.
HintA multimeter is used to measure the capacitance of an electric circuit.
96). Which of the following is the unit of conductance?
HintThe unit of Conductance Siemen.
97). Which of the following is the unit of Inductance?
HintThe unit of Inductance is Henry.
98). Which of the following is the unit of Impedance?
HintThe unit of Impedance is Ohms.
99). Which of the following is the unit of Frequency?
HintThe unit of frequency is Hertz.
100). Which of the following is the unit of Power?
HintThe unit of power is Watts.

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