Slew Rate Units. 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. a) Step size is too small. Analog Circuits Multiple Choice Questions on “Distortion in Amplifier-1”. Signal and Noise Amplitude Distortion. Phase response is function of frequency: b. twice the steady state value, and falls to zero. 13. Select the correct statement(s) regarding amplitude modulation (AM). The distortion caused by multiple frequencies in output is called _________A. 8. c) Modulating signal voltage = Carrier voltage Amplitude distortion occurs when Impulse response is not constant Impulse response is constant Frequency transfer function is constant Frequency transfer function is not constant. Many sine wave generation techniques simply cannot achieve Frequency-domain graph plots MCQs. Change in inputC. d) 0. Because of this, the relative amplitudes of the carrier and modulating signal are important. Clarification: An imaginary line connecting the positive peaks and negative peaks of the carrier waveform gives the exact shape of the modulating information signal. 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? Phase distortionD. In voice transmission, are low amplitude signals or large amplitude signals more likely to occur? In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. c) Receiver AmplificationC. a. IRD ® LLC. 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. 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. 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 DistortionD. Digital Communication Objective type Questions and Answers. Non-linear amplification is a common reason for distortion in the case of transistor. Amplitude Response should be constant for all frequencies b. 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. 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. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion. c. the IF amplifiers. 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. Expansion in time domain c. Compression in frequency domain d. Expansion in frequency domain View Answer / Hide Answer a. In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. b) Modulating signal voltage > Carrier voltage The carrier frequency remains constant during the modulation process, But its amplitude varies in accordance with the modulating signal. View MCQ-01-in-EST-Answer-Key.pdf from ECE 5734 at Technological University of the Philippines Visayas. b) 0.662 Answer: a Phase distortion can also be called as _________A. c) There is interference from the adjacent channel. Phone: 502-366-0916. CapacitorB. 4. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion. Where is the output produced by the amplifier as a function of time t.. Avionics Multiple Choice Questions on “Amplitude Modulation and Modulation Index”. In amplitude modulation, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. ANS-BOLD OPTION Which of the following amplifier is considered linear? Clarification: Distortion occurs when the modulating signal amplitude is greater than the amplitude of the carrier, causing incorrect information to be transmitted. What is the percentage of modulation if the modulating signal is of 7.5V and carrier is of 9V? 10. Engineering 2021 , Engineering Interview Questions.com. b) False. Shift in Q-pointB. This relationship, known as the modulation index m, is the ratio m = Vm⁄Vc. 6. b) Step size is too large. _____ is the maximum sideband suppression value using filter system. 3. c. Signal-plus-Noise-to-Noise Ratio. The amplitude modulation AM modulation depth figure is complementary to the modulation index. What is the modulation index value if Vmax=5.9v and Vmin=1.2v? 8. This constitute clipping. 795mV B. Distortion Less Transmission - Transmission is said to be distortion-less if the input and output have identical wave shapes. B. Feb 17,2021 - Amplitude Modulation | 10 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. The crest factor of a waveform is given as – a) 2Peak value/ rms value. Clarification: Over-modulation is a condition in which the modulating signal voltage is much greater than the carrier voltage. 7. 50 dB . b) Step size is too large. a) 100 MCQ Topic Outline included in ECE Board Exam Syllabi. Explanation: Distortion occurs when the modulating signal amplitude is greater than the amplitude of the carrier, causing incorrect information to be transmitted. Objective Questions and Answers on Digital communication . These short solved questions or quizzes are provided by Gkseries. Answer: b Harmonic distortion in power amplifiers. If the time constant is too long, the capacitor discharge will be too slow to follow the faster changes in the modulating signal. Step size is too small b. The ideal condition for AM is when Vm 5 Vc, or m 5 1, which gives 100 percent modulation. The simplest form of demodulator which works but does have a few drawbacks. Amplitude distortion occurs when Impulse response is not constant Impulse response is constant Frequency transfer function is constant Frequency transfer function is not constant. c) 10 Frequency; Amplitude; Phase; None of the above; Answer : 2. These short objective type questions with answers are very important for competitive exams. a) Step size is too small. Many applications require a frequency and/or amplitude-stable sine wave as a reference for calibration or measurement. c) 1.85v Computer Network MCQs Some important Computer Network MCQs are mentioned here. Clarification: In Amplitude Modulation, the amplitude of the carrier sine wave is varied by the value of the information signal. Digital Communication Objective type Questions and Answers. 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. Hence transistor is causing harmonic distortion. Answer: d In an AM wave useful power is carrier by …………. Granular noise occurs when. Many sine wave generation techniques simply cannot achieve 6-12(b) shows, but for wide deviations, amplitude distortion occurs because of the nonlinearity. a. b) Distortion d) Duplexer. MCQ in Electronic Circuits, Analysis, Design Part 5 as part of the Electronics Engineering Board Exam. It is called so because it associated with a delay. 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 Fax: 502-238-1001. The baseband bandwidth for a voice-grade Email: Required fields are marked *. induced distortion, then the input signal level must not exceed A. Time-domain graph plots MCQs. d) Ratio of modulation. Amplitude, frequency, and phase MCQs. ... Amplitude distortion occurs when: a. a) Slope overload distortion. The most likely choice would be a ______ amplifier. Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. Q19. They are. here you can learn mcqs questions for electrical engineering. Clarification: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. 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. d) Both a and b are correct . Solution for Question 1. This test is Rated positive by 85% students preparing for JEE.This MCQ test is related to JEE syllabus, prepared by JEE teachers. a) 2.35v Amplitude modulators compute the product of the carrier and modulating signals. b) 9.99 This maximum output value depends on the source voltage(VCC. Frequency; Amplitude; Phase; None of the above; Answer : 2. Clarification: When the modulation index is 1 or the percentage of modulation is 100, modulating signal voltage is equal to the carrier voltage. In this region, I c =βI b where Ic is collector current and Ib is base current, following linear relation y=mx. Non- linear amplificationD. Required fields are marked *. 7. RectifyingD. A. 9. 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. d) Bandwidth is too large . Low amplitude signals; maintaining a constant SQR through the dynamic range is desirable. Data and signal MCQs. Q4. MCQ on Measuring Instruments – 3. 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. Here, 12/10 = 1.2 which is greater than 1 and hence would cause over-modulation. Explanation: If we incorrectly design our amplifier and a change in Q-point occurs, then distortion in the amplifier is observed. a. Amplitude b. Compression in time domain b. This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Amplitude Modulation and Modulation Index”. a. Slope over load distortion b. Quantization noise c. Both a & b d. None of the above 7. 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? Test Your Answer Click Option Button. Q4. Answer: a. The offset drift is attributable to temperature-dependent voltage outputs. Resistive elements onlyC. Where is the output produced by the amplifier as a function of time t.. 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. c) Modulated peak line d) Small input signal. Q18. Example of a tuned amplifier is shown below. c) White noise. d) Bandwidth is too large . In amplitude modulation, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. 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 Phase distortion occurs when: a. 1. c) 0.425 It includes baseband transmission, attenuation distortion, and delays distortion. Modulation index is defined as: where m(t) is the modulating signal and A is the peak value of the unmodulated carrier wave. The FFT requires a time domain record with a number of samples (M) that is a power of 2. 14. 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) 4. The binary signal when ASK modulated, gives a zero value for Low input while it … Multiple Choice Questions and Answers on Digital Communication . b. the detector. Flat tops in the output signal is due to ___________A. If the amplitude of the modulating signal is less than the carrier amplitude, no distortion will occur. Less condition is over-modulation is a power of a Class b push-pull amplifier this of... 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