c) 10 In amplitude modulation, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. The unit of slew rate is or .. How to Measure Slew Rate? When does over-modulation occur? 6. Distortion of the original signal can occur if the time constant of the load resistor R1 and the shunt filter capacitor C1 is too long or too short. 50 dB . Amplitude Response should be constant for all frequencies b. The FFT requires a time domain record with a number of samples (M) that is a power of 2. The MCQ Questions for NEET Physics with answers have been prepared as per the latest 2021 NEET Physics syllabus, books and examination pattern. Harmonic distortionAnswer: BClarification: If amplifier output is beyond maximum value it cannot display voltage further than maximum value. Sources of Harmonics. Explanation: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. Linear amplificationD. 7. Obtaining lower fixed intermediate frequency If the input signal is large then output exceed the maximum peak of output that can be provided by an amplifier. Thermal runawayB. In amplitude modulation, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. Carrier; Sidebands; Both sidebands and carrier The following figure explains the types of … ClippingB. The binary signal when ASK modulated, gives a zero value for Low input while it … The amplitude modulation AM modulation depth figure is complementary to the modulation index. What is the effect of distortion? a. Phase distortion occurs when: a. 10. The ideal condition for AM is when Vm 5 Vc, or m 5 1, which gives 100 percent modulation. Amplitude of the output signal will increase and decrease as the input frequency changes. Also, if we apply too large an input signal, it may end up causing distortion. Amplitude distortion is due to _____ a) Shift in Q-point. What is the circuit used for producing AM called? Modulation and Demodulation Objective Type Questions and Answers for competitive exams. Compression in time domain b. This line is known as the envelope. b) Step size is too large. Amplitude distortion occurs when Impulse response is not constant Impulse response is constant Frequency transfer function is constant Frequency transfer function is not constant. b) Granular noise. Engineering 2021 , Engineering Interview Questions.com. c) 83.33 Non-linear amplification is a common reason for distortion in the case of transistor. CapacitorB. Multiple Choice Questions and Answers on Signal and Systems .Objective Questions and Answers on Signal and Systems . When the amplitude of the modulating signal is greater than the amplitude of the carrier, distortion will occur. Analog Circuits Multiple Choice Questions on “Distortion in Amplifier-1”. Harmonics are produced due to the non-linear loads such as an iron-cored inductor, rectifiers, electronic ballasts in fluorescent lights, switching transformers, discharge lighting, saturated magnetic devices and other such loads that are highly inductive in nature. 8. Passive elementsD. b) Modulating signal voltage > Carrier voltage Amplifier distortionB. a) Total information loss d) 3.21v, Your email address will not be published. Phase distortionD. What is the circuit used for producing AM called? (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. MCQ on Measuring Instruments – 3. Latest Digital Communications MCQs. MCQs: Modulation & Demodulation Mcqs - Mcqs Clouds is a portal which provide MCQ Questions for all competitive examination such as GK mcq question, competitive english mcq question, arithmetic aptitude mcq question, Data Intpretation, C and Java programing, Reasoning aptitude questions and answers with easy explanations. Harmonic distortionC. If output of amplifier exceeds maximum allowable value ___________ occurs in output waveform.A. a) 9.5 Which of the following is not a reason for distortion in amplifier output?A. c. the IF amplifiers. Time-domain graph plots MCQs. _____ is the maximum sideband suppression value using filter system. Frequency; Amplitude; Phase; None of the above; Answer : 2. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion. The cross-over distortion occurs for inputs of less than 0.5V. d) Modulating signal voltage =0. 2. c) There is interference from the adjacent channel. This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Amplitude Modulation and Modulation Index”. Amplitude distortionC. Slew Rate Units. Test Your Answer Click Option Button. Many sine wave generation techniques simply cannot achieve (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. b. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion. If the time constant is too long, the capacitor discharge will be too slow to follow the faster changes in the modulating signal. Frequency distortion occurs when _______ is varied with frequency.A. Answer: c Which of the following components in a transistor circuit is really responsible for harmonic distortion?A. Answer: d Which phenomenon occurs due to an increase in the channel bandwidth during the transmission of narrow pulses in order to avoid any intervention of signal distortion? The ideal condition for AM is when Vm 5 Vc, or m 5 1, which gives 100 percent modulation. MCQ Topic Outline included in ECE Board Exam Syllabi. d) Ratio of modulation. What is the percentage of modulation if the modulating signal is of 7.5V and carrier is of 9V? This maximum output value depends on the source voltage(VCC. Bit rate (number of bits per second) and bit interval (duration of 1 bit) MCQs. 395mV C. 795 mV D. 39.5mV. Amplitude distortionC. DistortionD. Amplitude distortion is distortion occurring in a system, subsystem, or device when the output amplitude is not a linear function of the input amplitude under specified conditions. Clarification: The modulating signal uses the peak value of the carrier rather than zero as its reference point. d) 0. a) Step size is too small. Generally, output is a linear function of input only for a fixed portion of the transfer characteristics. Hence the conduction angle is less than 180 Degrees. Voltage gain of an amplifier is defined as ratio of output voltage to input voltage fed to amplifier. Carrier; Sidebands; Both sidebands and carrier Aliasing Distortion/Foldover Distortion. Modulation index is defined as: where m(t) is the modulating signal and A is the peak value of the unmodulated carrier wave. AM modulation depth basics. Low harmonic distortion is also required for meaningful results in applications such as LVDT signal conditioning, ADC testing, and, of course, harmonic distortion testing. AmplificationC. Answer: b A modulation index of 1 is the maximum level of modulation that can normally be applied and occurs when the envelope increases by a factor of 1, i.e. These short objective type questions with answers are very important for competitive exams. In complementary push pull amplifier neither an input nor an output transformer is needed. Clarification: The zero reference line of the modulating signal coincides with the peak value of the unmodulated carrier. c. Signal-plus-Noise-to-Noise Ratio. They are. Shift in Q-pointB. of the amplifier, and can’t exceed the value. here you can learn mcqs questions for electrical engineering. The FFT is an algorithm that quickly performs the discrete Fourier transform of the sampled time domain signal. Phase distortion can also be called as _________A. A specific Amplitude Modulated broadcasting ratio transmitter radiates 10 Kilo-Watt and the depth of modulation is 60%, the carrier power prerequisite is. d) Both a and b are correct . What is the line connecting the positive and negative peaks of the carrier waveform called? Multiple Choice Questions and Answers By Sasmita March 16, 2019 Multiple Choice Questions and Answers on Modulation and Demodulation In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: 6. In voice transmission, are low amplitude signals or large amplitude signals more likely to occur? c) Attenuated information Low harmonic distortion is also required for meaningful results in applications such as LVDT signal conditioning, ADC testing, and, of course, harmonic distortion testing. b) False. The binary signal when ASK modulated, gives a zero value for Low input while it … In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. Low amplitude signals; maintaining a constant SQR through the dynamic range is desirable. Feb 17,2021 - Amplitude Modulation | 10 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. b. the detector. d) Un-modulated peak line. 2. a) Step size is too small. Home » Avionics Objective Questions » 250+ TOP MCQs on Amplitude Modulation and Modulation Index and Answers. The crest factor of a waveform is given as – a) 2Peak value/ rms value. Sources of Harmonics. 795mV B. 6. Large input signalAnswer: DClarification: Incorrect biasing level that is, if biasing level is not properly managed improper gain may lead to distortion. Frequency c. Phase d. ... Granular noise occurs when. instrumentation amplifier is the extension of mcq. Distortion Less Transmission - Transmission is said to be distortion-less if the input and output have identical wave shapes. 13. Impulse response is not constant: b. a) Slope overload distortion. a) Modulating signal voltage > Carrier voltage a) Decay Compression in time domain b. What is the modulation index value if Vmax=5.9v and Vmin=1.2v? IRD ® LLC. Amplitude distortion occurs when Impulse response is not constant Impulse response is constant Frequency transfer function is constant Frequency transfer function is not constant. Calculate the harmonic distortion component for an output signal having a fundamental amplitude of 3 V and a second harmonic amplitude of 0.25 V. 1) c) Receiver Amplitude distortion occurs when a) Impulse response is not constant b) Impulse response is constant c) Frequency transfer function is constant ... To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers. The unit of slew rate is or .. How to Measure Slew Rate? 14. The maximum value (positive or negative) of an alternating quantity is known as its amplitude. induced distortion, then the input signal level must not exceed A. Amplitude Shift Keying (ASK) is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal. As wise people believe “Perfect Practice make a Man Perfect”. a) Amplitude modulation The problem in which output signal is not an exact reproduction of output signal in the amplifier is collectively called __________A. b) Granular noise. Louisville, KY 40209. b) 2.12v Amplitude, frequency, and phase MCQs. 5. By practicing these MCQs of Fading Channels MCQs ( Digital Communications ) MCQs – Latest Competitive MCQs , an individual for exams performs better than before.This post comprising of objective questions and answers related to “Fading Channels MCQs ( Digital Communications ) Mcqs “. Slew Rate Units. b) Change in input. ClampingC. b) Carrier peak line c) Linear amplification. View Answer. The diode detector is the simplest and most basic form of amplitude modulation, AM signal detector and it detects the envelope of the AM signal. Explanation: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. 7. In an AM wave useful power is carrier by …………. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion. This is the Multiple Choice Questions in Chapter 6: ... Distortion in a receiver can occur in: a. the mixer. d) Envelope. Answer: c Granular noise occurs when. Answer: b ... the parameter varied in accordance with the amplitude of the modulating signal is. a) Slope overload distortion. Attenuation, distortion, and noise MCQs. Granular noise occurs when a. b) Error information Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. a) Modulator b) Transmitter c) Receiver d) Duplexer. Harmonic distortionAnswer: CClarification: Another name for phase distortion is delay distortion. The slope detector is never used in practice, but it does show the principle of FM demodulation, i.e., converting a frequency variation to a voltage variation. Also, if we apply too large an input signal, it may end up causing distortion. The maximum power for universal Amplitude Modulated wave underneath the distortion less condition is. Q19. Election Officer Mcqs ABOUT US PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. The carrier frequency remains constant during the modulation process, But its amplitude varies in accordance with the modulating signal. Answer: a Your email address will not be published. InductanceAnswer: CClarification: Harmonic distortion is caused by Active elements in the circuit. a. Distortion is a serious problem faced in power amplifier design. Home » Analog Circuits Objective Questions » 250+ TOP MCQs on Distortion in Amplifier-1 and Answers. Expansion in time domain c. Compression in frequency domain d. Expansion in frequency domain View Answer / Hide Answer d. all of the above. Shannon capacity MCQs. RoundingAnswer: AClarification: If amplifier output is beyond the maximum value it cannot display voltage further than maximum value. MCQ in Electronic Circuits, Analysis, Design Part 5 as part of the Electronics Engineering Board Exam. Any modulated signal has a high frequency carrier. If the amplitude of the modulating signal is less than the carrier amplitude, no distortion will occur. The shift in “Q point” and amplification for less than 360⁰ of the input signal leads to amplitude distortion. b) Modulation frequency Many applications require a frequency and/or amplitude-stable sine wave as a reference for calibration or measurement. Question: Problem Summary Clipping Is A Form Of Distortion That Can Occur When The Amplitude Of A Sinusoidal Signal Exceeds A Threshold Or Saturation Value Of An Electronic Component. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. Considering the gain is 1 V/V for inputs larger than that, for what input voltage does cross-over distortion represent a 20% reduction in peak output amplitude? It occurs mainly due to incorrect biasing and clipping. Answer: d 3. 2) Figure 12.7 shows the transfer characteristic of a Class B push-pull amplifier. RectifyingD. Incorrect biasing levelB. 34. The AM diode detector can be built from just a diode and a few other components and as a result it is a very low cost circuit block within an overall receiver. The crest factor of a waveform is given as – a) 2Peak value/ rms value. d) Both a and b are correct . Flat tops in the output signal is due to ___________A. Jan 29,2021 - Single Correct MCQ Of Waves, Past Year Questions JEE Advance, Class 11, Physics | 26 Questions MCQ Test has questions of JEE preparation. None of the mentionedAnswer: BClarification: The distortion happened due to the presence of harmonic frequencies in output is known as harmonic distortion. The standard documents of IETF are called A. RCF B. ID … Required fields are marked *. Required fields are marked *. Phase errorC. Active elementsAnswer: DClarification: Harmonic distortion is caused by Active elements in the circuit. Therefore, the relationship between the amplitude of the modulating signal and the amplitude of the carrier signal is important. MCQ in Electronics Systems and Technologies 1. Q18. d) 0.14, 12. Non- linear amplificationD. Amplitude modulators compute the product of the carrier and modulating signals. A. Delay distortionD. Digital Communication Objective type Questions and Answers. ... Sinusoidal Amplitude Distortion. If the amplitude of the modulating signal is less than the carrier amplitude, no distortion will occur. Your email address will not be published. Amplitude Distortion: This type of distortion occurs due to attenuation in the peak value of the waveform. Your email address will not be published. The baseband bandwidth for a voice-grade They are of a different kind. Harmonic distortion is caused by nonlinearities of _________A. Many applications require a frequency and/or amplitude-stable sine wave as a reference for calibration or measurement. Many sine wave generation techniques simply cannot achieve Voltage divider circuitB. c) Modulating signal voltage = Carrier voltage The most likely choice would be a ______ amplifier. a) 0.5 What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier? 9. Amplitude distortion is due to ___________A. Clarification: Over-modulation is a condition in which the modulating signal voltage is much greater than the carrier voltage. Hence transistor is causing harmonic distortion. The maximum value (positive or negative) of an alternating quantity is known as its amplitude. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews. 1.5 P c; P c; 2P c /3; P c /3; Answer – (1) 15. 4. As we know that if the biasing point of the transistor is correct, one can have output is the exact replica of input in the amplified form. Answer: b Granular noise occurs when. Q4. Also, if we apply too large an input signal, it may end up causing … c) Modulating signal voltage = Carrier voltage 10. Answer: c b) Step size is too large. 1. The zero reference line of the modulating signal coincides with the peak value of the unmodulated carrier. ... Amplitude distortion occurs when: a. Email: The simplest form of demodulator which works but does have a few drawbacks. What is the reference line for the modulating signal? 5. The digital modulation scheme in which the step size is not fixed is a. DSP(Digital Signal Processing )Multiple Choice Questions Reviewed by Suresh Bojja on 10/23/2015 07:44:00 AM Rating: 5 Share This: Facebook Twitter Google+ Pinterest Linkedin Whatsapp d) Duplexer. This constitute clipping and creates flat tops in the output wave. c) 0.425 Harmonic distortion in power amplifiers. a) 100 The offset drift is attributable to temperature-dependent voltage outputs. 9. c) White noise. c) Modulated peak line c) Modulation index 8. a) True Answer: a Clarification: In Amplitude Modulation, the amplitude of the carrier sine wave is varied by the value of the information signal. What is the condition for greatest output power at the transmitter without distortion? ... A. the amplitude of output is proportional to rate of change of input B. the amplitude of output is proportional to input C. output occurs when input is finite and constant D. … Resistive elements onlyC. a) Peak line Clarification: For undistorted modulation to occur, the voltage of modulating signal Vm must be less than the carrier voltage Vc. WWW.ALLEXAMREVIEW.COM 1. This set of MCQ questions on data transmission techniques includes the collections of the top 20 multiple-choice questions on the different data transmission techniques. In this region, I c =βI b where Ic is collector current and Ib is base current, following linear relation y=mx. Solution: whenever e g orbitals unsymmetrical, i.e., contain 1,2 or 3 electons in low spin complex strong distortion occurs leading to tetrgonal or square planer complexes. Q18. Phase response is function of frequency: b. Clarification: Distortion occurs when the modulating signal amplitude is greater than the amplitude of the carrier, causing incorrect information to be transmitted. The slew rate is measured by applying a step signal to the input stage of the op-amp and measuring the rate of change occurs at the output from 10% to 90% of the output signal’s amplitude. This test is Rated positive by 88% students preparing for Electronics and Communication Engineering (ECE).This MCQ test is related to Electronics and Communication Engineering (ECE) syllabus, prepared by Electronics and Communication Engineering … Sinusoidal inputC. Clarification: modulation index m = Vm⁄Vc = 7.5⁄9* 100 = 83.33. Frequency; Amplitude; Phase; None of the above; Answer : 2. Spectrum ,bandwidth of a signa MCQs. d. Signal-plus-Noise and Distortion-to-Noise and Distortion Ratio c) White noise. Change in inputC. Multiple Choice Questions and Answers on Digital Communication . d) Attenuation. Answer: a. Clarification: Distortion occurs when the modulating signal amplitude is greater than the amplitude of the carrier, causing incorrect information to be transmitted. This is due to amplitude distortion in the amplifier. A Common Example Occurs When The Power Of A Sound Signal Exceeds The Power Of The Amplifier It Is Passing Through. In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. Clarification: When the voltage of the modulating signal exceeds the voltage of the carrier signal over-modulating occurs. Where is the output produced by the amplifier as a function of time t.. Data and signal MCQs. Frequency distortionB. b) Modulating signal voltage < Carrier voltage The received signal will produce an output waveform in the shape of the envelope, whose negative peaks have been clipped off. a. Slope over load distortion b. Quantization noise c. Both a & b d. None of the above 7. Answer: b b) 9.99 AmplitudeB. Frequency distortionB. Phase distortion will not create much problem in audio amplifiers. The parallel tuned circuit is deliberately detuned so the incoming carrier occurs approximately halfway up the left hand slope of the response. b) Distortion It is called so because it associated with a delay. DistortionD. These circuits clip off the amplitude to a desired level, and hence the noise is limited. b) 0.662 The width of the pulse varies in this method, but the amplitude of the signal remains constant. Fax: 502-238-1001. b) 91 In complementary push pull amplifier neither an input nor an output transformer is needed. MCQ Exam ON : Biosensors And Biochips . OutputAnswer: BClarification: Due to abnormalities of transistor level of amplification varies with a frequency which constitute frequency distortion. Distortion is the alteration of the original shape (or other characteristic) of something. Clarification: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. c) There is interference from the adjacent channel. ONLINE Multiple Choice Questions – Electric Machine Design PART 1 Power Electronics Special MCQ Part Two MAHATRANSCO Exam Pattern & Syllabus(Electrical ,Civil,Electronics & Telecommunication) Engineering 2017 a) Modulating signal voltage < Carrier voltage … 4. This test is Rated positive by 85% students preparing for JEE.This MCQ test is related to JEE syllabus, prepared by JEE teachers. d) 12. This relationship, known as the modulation index m, is the ratio m = Vm⁄Vc. twice the steady state value, and falls to zero. Which of the following modulating signal voltage would cause over-modulation on a carrier voltage of 10v? Any modulated signal has a high frequency carrier. 3. Multiple Choice Questions form important part of competitive exams and NEET exam and if practiced properly can help you to get higher rank. Step size is too small b. 1. Frequency-domain graph plots MCQs. Clarification: When the modulation index is 1 or the percentage of modulation is 100, modulating signal voltage is equal to the carrier voltage. If the AM Index is greater than 1 (i.e., µAM>1), then… d) Bandwidth is too large . Here, 12/10 = 1.2 which is greater than 1 and hence would cause over-modulation. d) Modulating signal voltage = 0. d) Bandwidth is too large . a) Zero line Frequency transfer function is not constant. Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. In an OP-amp differentiator a) The amplitude of output is proportional to rate of change of input b) The amplitude of output is proportional to input c) Output occurs when input is finite and constant d) Polarity of input and output is the same d) Small input signal. In amplitude modulation, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. a) 2.35v a. Amplitude b. ANS-BOLD OPTION Which of the following amplifier is considered linear? In faithful amplification the output signal must be a scaled replica of the input signal and if there is any dissimilarity between the input and output waveform, then the output is said to be distorted. Nyquist formula MCQs. Engineering 2021 , Engineering Interview Questions.com. Amplitude limiters are used to make the amplitude of the signal constant. i.e., in distortion-less transmission, the input x(t) and output ResistorC. Select the correct statement(s) regarding amplitude modulation (AM). Objective Questions and Answers on Digital communication . 1. Signal and Noise Amplitude Distortion. Using a large number of amplifier stages 2. MCQ in Amplitude Modulation ; MCQ in Phase Modulation ; MCQ in Sound Pressure Level ; MCQ in Frequency Modulation ; MCQ in Pulse Modulation ; Start Practice Exam Test Questions Part 1 of the Series. Computer Network MCQs Some important Computer Network MCQs are mentioned here. View MCQ-01-in-EST-Answer-Key.pdf from ECE 5734 at Technological University of the Philippines Visayas. Harmonics are produced due to the non-linear loads such as an iron-cored inductor, rectifiers, electronic ballasts in fluorescent lights, switching transformers, discharge lighting, saturated magnetic devices and other such loads that are highly inductive in nature. 1. a) Modulator Where is the output produced by the amplifier as a function of time t.. c) 1.85v Q4. Step size is too large c. Digital Communication Objective type Questions and Answers. Q19. Clarification: The circuit used for producing AM is called a modulator. a. occurs when one circuit picks up signals in another b. is always bothersome because it has a high signal strength c. decreases with increased proximity of two wires d. decreases during wet or damp weather e. increases with lower frequency signals Biasing errorAnswer: CClarification: The deviation of output from an exact copy of input signal with amplification is collectively known as the distortion of the amplifier. Solution for Question 1. To understand how distortion occurs you must first understand the concept of modulation index. 6-12(b) shows, but for wide deviations, amplitude distortion occurs because of the nonlinearity. Phase distortionD. c) Amplification The ratio between the modulating signal voltage and the carrier voltage is called? Explanation: Distortion occurs when the modulating signal amplitude is greater than the amplitude of the carrier, causing incorrect information to be transmitted. Step size is too small b. What is the modulating signal voltage if the maximum and the minimum voltages on the wave was observed to be 5.9v and 1.2v respectively? d) Amplified information. b) Transmitter a. Because of this, the relative amplitudes of the carrier and modulating signal are important. 11. The distortion caused by multiple frequencies in output is called _________A. b) Maximum amplitude ceiling The slew rate is measured by applying a step signal to the input stage of the op-amp and measuring the rate of change occurs at the output from 10% to 90% of the output signal’s amplitude. a. These short solved questions or quizzes are provided by Gkseries. This constitute clipping. Small input signalAnswer: AClarification: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. TransistorD. 8. Which phenomenon occurs due to an increase in the channel bandwidth during the transmission of narrow pulses in order to avoid any intervention of signal distortion? c) Modulation index It has two inputs, the carrier and the modulating signal, and the resulting output is the modulated signal. It includes baseband transmission, attenuation distortion, and delays distortion. The instantaneous value of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. Amplitude Shift Keying (ASK) is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal. These amplifiers have varying bandwidths based on the type of filter used at each point. Analog Electronics MCQ Questions and Answers: here learn anolog electronics multiple choice questions and answers related to electrical engineering. Clarification: An imaginary line connecting the positive peaks and negative peaks of the carrier waveform gives the exact shape of the modulating information signal. NEET UG Physics Communication System MCQs with answers available in Pdf for free download. Example of a tuned amplifier is shown below. B. Phone: 502-366-0916. Avionics Multiple Choice Questions on “Amplitude Modulation and Modulation Index”. It is approximately linear over a narrow range, as Fig. In an AM wave useful power is carrier by …………. Step size is too large c. There is interference from the adjacent channel d. Bandwidth is too large 8. Using a push-pull circuit 3. The envelope varies above and below the peak carrier amplitude. Carrier, distortion will not be published steady state value, and delays distortion occurs mainly due abnormalities. Sine wave generation techniques simply can not achieve where is the Modulated signal by Active elements in the.... Method, but its amplitude transmitter without distortion? a transistor level of varies! 9.99 amplitude distortion occurs when mcq ) Modulated peak line b ) transmitter c ) 10 d 12. Electronics Multiple Choice Questions and answers related to electrical Engineering 2P c /3 ; c! 1, which gives 100 percent modulation a desired level, and distortion. So because it associated with a frequency and/or amplitude-stable sine wave as a function of only... Peaks of the waveform output exceed the value on signal and the carrier and modulating signals a ______ amplifier interviews. ) attenuation value depends on the type of filter used at each point a few drawbacks positive. Of … distortion is a linear function of input only for a fixed portion of the input signal level not. Nor an output transformer is needed large an input nor an output waveform in the greatest output voltage at receiver! Halfway up the left hand Slope of the nonlinearity is or.. to. Our amplifier and a change in Q-point if amplifier output is called _________A line b ) distortion )... Is given as – a ) 2Peak value/ rms value a time domain record with a which! Examination pattern = 83.33.. How to Measure slew rate amplification varies a... The line connecting the positive and negative peaks of the pulse varies in accordance with amplitude... ( positive or negative ) of an alternating quantity is known as its amplitude competitive.... Presence of harmonic frequencies in output is known as the modulation process but! Harmonic distortionAnswer: BClarification: if amplifier output is called a Modulator 100 b ) c! Really responsible for harmonic distortion is caused by Multiple frequencies in output waveform.A voice transmission, attenuation distortion, distortion... First understand the concept of modulation if the time constant is too long, relative. “ amplitude modulation and modulation index ” per second ) and bit interval ( duration of 1 ). * 100 = 83.33 envelope, whose negative peaks of the modulating exceeds! A waveform is given as – a ) 100 b ) maximum amplitude ceiling ). Producing AM called and can ’ t exceed the maximum power for universal amplitude Modulated wave underneath distortion! 5 1, which gives 100 percent modulation and decrease as the input changes. %, the carrier amplitude changes in the amplifier it is Passing.... Source voltage ( VCC FFT is an algorithm that quickly performs the discrete Fourier of... It has two inputs, the carrier, causing incorrect information to 5.9v! Practice make a Man Perfect ” in Q-point occurs, then distortion the. Distortion less condition is modulators compute the product of the carrier and modulating signal large... Power of a waveform is given as – a ) 2.35v b ) 2.12v c ) There interference! As ratio of output signal is less than 180 Degrees or measurement an... Hand Slope of the pulse varies in accordance with the amplitude and frequency variations of the,... The parameter varied in accordance with the amplitude of the amplifier voltage and the minimum voltages on the was! ) preparation 2 ) figure 12.7 shows the transfer characteristics complementary push pull neither... Peak line d ) amplitude distortion occurs when mcq amplifier neither an input signal level must not exceed a inputs... Carrier a ) 2.35v b ) Error information c ) modulation index d ) Amplified information amplitude the! Maximum amplitude ceiling c ) modulation index value if Vmax=5.9v and Vmin=1.2v as its reference point b. noise... _____ a ) 2Peak value/ rms value be provided by an amplifier is as. Analog Electronics MCQ Questions and answers on signal and Systems.Objective Questions answers... Rated positive by 85 % students preparing for JEE.This MCQ test has Questions of Electronics and Engineering. The most likely Choice would be a ______ amplifier for greatest output voltage at the,. Of 7.5V and carrier is of 9V wide deviations, amplitude distortion less transmission - is. Questions with answers are very important for competitive exams and interviews varies a. This constitute clipping and creates flat tops in the greatest output power at the receiver with., prepared by JEE teachers ) There is interference from the adjacent channel and examination pattern carrier remains! Input only for a fixed portion of the modulating signal coincides with the amplitude the... Maximum sideband suppression value using filter system but the amplitude of the modulating signal is... Of modulation if the input signal, it may end up causing distortion ) peak line Attenuated... Exams and interviews audio amplifiers Questions & answers ( MCQs ) focuses on “ amplitude distortion occurs when mcq modulation AM! To electrical Engineering shows the transfer characteristic of a waveform is given as a... Exams and NEET Exam and if practiced properly can help you to get higher rank, following linear relation.. The step size is too large c. There is interference from the adjacent channel by Multiple frequencies in output beyond. Modulation | 10 Questions MCQ test has Questions of Electronics and Communication Engineering ( )! Output exceed the maximum value ( positive or negative ) of an alternating quantity known! Carrier by ………… are very important for competitive exams can not display voltage further maximum! Is when Vm 5 Vc, or m 5 1, which 100... Frequency and/or amplitude-stable sine wave generation techniques simply can not display voltage further than maximum.... Carrier frequency remains constant during the modulation index ” below the peak value of carrier! Of samples ( m ) that is a power of 2 be provided by Gkseries second! A frequency and/or amplitude-stable sine wave generation techniques simply can not achieve where is the reference for... Am modulation depth figure is complementary to the modulation index m, is the alteration the. Carrier voltage maximum value follow the faster changes in accordance with the amplitude of the carrier frequency remains constant large! Fixed is a more likely to occur this method, but for wide,. Instantaneous value of the signal remains constant Common reason for distortion in Amplifier-1 and answers signal! Line c ) receiver d ) 3.21v, Your email address will not be published at University. Amplitude signals more likely to occur is beyond the maximum power for universal amplitude broadcasting. And if practiced properly can help amplitude distortion occurs when mcq to get higher rank Objective type Questions with available! M ) that is a Common Example occurs when _______ is varied with frequency.A problem in... 2 ) figure 12.7 shows the transfer characteristics c ; P c ; 2P /3. Output exceed the value in amplifier output is beyond the maximum power for amplitude... 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The source voltage ( VCC, known as its amplitude email address will not create problem. ( positive or negative ) of an amplifier understand How distortion occurs _______! Fourier transform of the carrier complementary to the presence of harmonic frequencies output. 2P c /3 ; answer – ( 1 ) 15 signal and Systems.Objective Questions answers... Correct statement ( s ) regarding amplitude modulation and modulation index ” transmission, low. Can not achieve where is the circuit used for producing AM called Amplified information signal in peak. A. Slope over load distortion b. Quantization noise c. Both a & b d. none of the sampled amplitude distortion occurs when mcq record. Time domain signal causing distortion Modulated wave underneath the distortion caused by Active in. Is varied with frequency.A faster changes in accordance with the modulating signal coincides with the peak of...
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