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Get Price2021-2-24 · 553. It is a high-gain, low noise, tuned amplifier that, when used is the first active encountered by the receiver signal. a. mixer . b. local oscillator . c. RF amplifier . d. detector
Get Price2021-2-24 · a. A detector that provides local oscillator for input to the mixer . b. A detector that amplifies and narrows the bandpass frequencies . c. A detector that uses mixing process with a locally generated carrier . d. A detector used to detect cross-modulation products
Get Price2020-3-27 · a. used for a precise frequency. b. used for very low frequency drift (parts per million) c. made by grinding quartz to exact dimensions. d. all of the above
Get PriceD. mixer input must be tuned to the signal frequency. Answer. D. Q.32. A duplexer is a device used to. A. feed more than one receiver from a single antenna B. connect two transmitters to the same antenna C. connect a receiver and a transmitter to the same antenna D. none of these. Answer. C. Q.33. A heterodyne frequency changer is called a. A. Modulator
Get Price2021-2-24 · MCQ Topic Outline included in ECE Board Exam Syllabi. MCQ in Amplitude Modulation ; MCQ in Phase Modulation ; MCQ in Sound Pressure Level ; MCQ in Frequency Modulation ; MCQ in Pulse Modulation ; Continue Practice Exam Test Questions Part 19 of the Series. 901. The principal circuit in the popular 1496/1596 IC balanced modulator is a . a. Differential amplifier . b.
Get Price2016-11-30 · 43) In radio receivers, varactor diodes are used for. a. Tuning b. Demodulation c. Mixing d. None of the above. ANSWER: (a) Tuning. 44) The standard value for Intermediate frequency (IF) in double conversion FM receivers is. a. 455 KHz b. 580 KHz c. 10.7 MHz d. 50 MHz. ANSWER: (c) 10.7 MHz. 45) Amplitude limiter in FM receivers are used to. a.
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Get Price2021-7-1 · « Back CONTENTS Next » 1. Universal motors are used in (a) conveyor. (b) food mixer. (c) elevator. (d) refrigerator. 2. Which of the following materials is generally used for the construction of a variable reluctance stepper motor? (a) Paramagnetic. (b) Diamagnetic. (c) Ferromagnetic. (d) Antiferromagnetic. 3. In permanent magnet stepper motor, the direction […]
Get Price2016-11-30 · 13) After passing the FM signal through mixer, what is the change in the frequency deviation Δ when the modulating frequency is doubled? a. Becomes 2 Δ b. Becomes Δ /2 c. Becomes Δ 2 d. Remains unchanged. ANSWER: (d) Remains unchanged. 14) In frequency modulation, a. Armstrong method is used for generation b. Multiple side bands are ...
Get Price2016-11-30 · 43) In radio receivers, varactor diodes are used for. a. Tuning b. Demodulation c. Mixing d. None of the above. ANSWER: (a) Tuning. 44) The standard value for Intermediate frequency (IF) in double conversion FM receivers is. a. 455 KHz b. 580 KHz c. 10.7 MHz d. 50 MHz. ANSWER: (c) 10.7 MHz. 45) Amplitude limiter in FM receivers are used to. a.
Get PriceAmplitude Modulation - Electronic Engineering (MCQ) questions & answers. a. Needs additional system for generation of carrier. b. Needs additional system for synchronization of carrier. d. All of the above. Disadvantages of using synchronous detection of AM signal are that it needs an additional system for generation of carrier. The frequency ...
Get Price2013-11-13 · (21) Trough a mixer when an FM signal with a deviation d is passed its frequency is reduced five fold. The deviation in the output of the mixer is (A) Indeterminate (B) 5d (C) d (D) d/5 View Answer Hide Answer. ANSWER: d (22) In a plate modulated class C amplifier leak type bias is used to
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Get Price2021-7-1 · « Back CONTENTS Next » 1. Universal motors are used in (a) conveyor. (b) food mixer. (c) elevator. (d) refrigerator. 2. Which of the following materials is generally used for the construction of a variable reluctance stepper motor? (a) Paramagnetic. (b) Diamagnetic. (c) Ferromagnetic. (d) Antiferromagnetic. 3. In permanent magnet stepper motor, the direction […]
Get Price2020-6-2 · Mixer used for rubber compounding is_____? Mechanical Operations; Mixer used for rubber compounding is_____? ... of discussion that starts with individual response if the students then formulate student’s pairs then the pairs are used to form groups of four. Next Next post: The ratio of the radius of two circles is 1: 3, and then the ...
Get Price2016-11-30 · 13) After passing the FM signal through mixer, what is the change in the frequency deviation Δ when the modulating frequency is doubled? a. Becomes 2 Δ b. Becomes Δ /2 c. Becomes Δ 2 d. Remains unchanged. ANSWER: (d) Remains unchanged. 14) In frequency modulation, a. Armstrong method is used for generation b. Multiple side bands are ...
Get Price2013-11-13 · (21) Trough a mixer when an FM signal with a deviation d is passed its frequency is reduced five fold. The deviation in the output of the mixer is (A) Indeterminate (B) 5d (C) d (D) d/5 View Answer Hide Answer. ANSWER: d (22) In a plate modulated class C amplifier leak type bias is used to
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Get Price2016-10-24 · ELECTRONICS AND COMMUNICATION ENGINEERING IMPORTANT MCQ-RADIO RECEIVERS. 1. Indicate which of the following statements about the advantages of the. A. Much easier alignment. 2. Show which of the following statements about the amplitude limiter is. A. The circuit is always biased in class C, by virtue of the leak-type.
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Get Price2015-5-12 · The function of a frequency mixer in a super heterodyne receiver is that it mixes or multiplies the incoming modulated carrier with the locally generated carrier. It then produces a number of frequencies. The produced frequencies are either the sum or the differences of the frequencies of the received signals. The output of the mixer is used to ...
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Get Price2017-12-21 · Multiple Choice Questions and Answers By Sasmita December 21, 2017. Q.1. In Frequency Modulation –. a. Amplitude of the carrier remains same. b. Frequency of the carrier varies in accordance with the modulating signal. c.
Get PriceQ7. The costas receiver is used for. a) FM signal. b) DSB-SC signal. c) PCM signal. d) DM signal . Q8. The advantages of using an RF amplifier are. a) Better sensitivity. b) Improved signal to noise ratio. c) Better selectivity. d) All of the above . Q9. Function of frequency mixer in super heterodyne receiver is. a) Amplification. b) Filtering
Get PriceElectronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. Subject: Analog Communication 4. Part 4: List for questions and answers of Analog Communication. Q1. For a FM signal v (t) = 15 cos ( 10 * 10^8t + 10 sin 1220t), calculate. 1. Carrier frequency. 2. Modulating frequency.
Get Price2021-6-30 · Bevel Gears MCQ Practice Test. 1. In case of hypoid gears, the axes of shafts are (A) Parallel ... When bevel gears are used to transmit power between shafts that are intersecting at an angle greater than 90 ... In a concrete mixer, the bevel gears for rotating the drum are generally made by (A) Casting (B) Forging (C) Hobbing
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Get Price2021-6-9 · Wave Analyzers. The electronic instrument used to analyze waves is called wave analyzer. It is also called signal analyzer, since the terms signal and wave can be interchangeably used frequently. We can represent the periodic signal as sum of the following two terms. So, analyzation of a periodic signal is analyzation of the harmonics ...
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