An amplitude modulation performs the mathematical operation of

(A) Division (B) multiplication

(C) subtraction (D) addition

1 Answer

Answer :

An amplitude modulation performs the mathematical operation of multiplication

Related questions

Description : In amplitude modulation AM, if modulation index is more than 100% then: (1) Power of the wave increases. (2) Efficiency of transmission increases. (3) The wave gets distorted. (4) Bandwidth increases

Last Answer : In amplitude modulation AM, if modulation index is more than 100% then: The wave gets distorted.

Description : The computer performs all mathematical and logical operations inside its _______ A. Visual Display Unit B. Memory Unit C. Output Unit D. Central Processing Unit

Last Answer : D. Central Processing Unit

Description : Which of the following statement is false? Modulation is used to: (1) Reduce the bandwidth used (2) Separate differing transmissions (3) Ensure that intelligence may be transmitted over long distances (4) Allow the use of practicable antennas

Last Answer : Which of the following statement is false? Modulation is used to: Reduce the bandwidth used

Description : The receive GCE system in an earth station performs what function(s)? A. Modulation and multiplexing B. Up conversion C. Demodulation and demultiplexing D. Down conversion

Last Answer : C. Demodulation and demultiplexing

Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. modem e. none of the above

Last Answer : modem

Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. Modem

Last Answer : d. Modem

Last Answer : In AM the amplitude of carrier components remains constant, while in FM it does not remain constant.

Description : What is the full form of 'AM' regarding radio broadcasting? (1) Amplitude Movement (2) Anywhere Movement (3) Amplitude Matching (4) Amplitude Modulation

Last Answer : (4) Amplitude Modulation Explanation: AM broadcasting is the process of radio broadcasting using amplitude modulation. AM was the first method of impressing sound on a radio signal and is still ... frequency. It then amplifies changes in the signal voltage to drive a loudspeaker or earphones.

Description : In modulation technique, which of the following is referred to audible pitch? A. Width B. Frequency C. Harmonic D. Amplitude

Last Answer : B. Frequency

Description : This is referred to a product of simultaneous frequency and amplitude modulation or a carrier frequency variation which produces unwanted distortion. A. Absorption modulation B. Simultaneous modulation C. Dynamic instability D. Series modulation

Last Answer : C. Dynamic instability

Description : In amplitude modulation technique the unmodulated carrier is referred to as having ______. A. 100% modulation B. 0% modulation C. 50% modulated D. Over modulated

Last Answer : B. 0% modulation

Description : Which of the following systems is not used in radio detection and ranging? A. Frequency shift B. Frequency modulation C. Pulse radar D. Amplitude modulation

Last Answer : D. Amplitude modulation

Description : Used for time division multiplexing. A. Frequency modulation B. Pulsed modulation C. SSB D. Amplitude modulation

Last Answer : B. Pulsed modulation

Description : Modulation means A. Varying of information B. Utilization of a single transmission channel to carry multiple signals C. Varying of some parameters of a carrier such as its amplitude to transmit information D. Transmit pulses in DC form on a copper wire

Last Answer : C. Varying of some parameters of a carrier such as its amplitude to transmit information

Description : If the percentage modulation of an AM amplifier is 88% and the modulating signal is 1 volt, the carrier has an amplitude of _______________. A. 1.14 volts B. 0.88 volt C. 1.88 volts D. 0.12 volt

Last Answer : A. 1.14 volts

Description : Three audio waves with 100,200 and 300 volts amplitude respectively, simultaneously modulate a 450 volts carrier. What is the total percent of modulation of the AM wave? A. 69 % B. 115.5 % C. 50% D. 83%

Last Answer : D. 83%

Description : ECE Board Exam March 1996 One type of pulse communications system uses pulse that appear as a group, and which vary in number according to the loudness of the voice. This type of ... A. pulse duration modulation B. pulse amplitude modulation C. pulse code modulation D. pulse position modulation

Last Answer : A. pulse duration modulation

Description : In frequency modulation, amplitude of modulated wave is A. positive B. negative C. constant D. zero

Last Answer : constant

Description : Variation in amplitude or frequency of carrier wave is called A. amplitude modulation B. frequency modulation C. modulation D. bandwidth

Last Answer : modulation

Description : Quadrature amplitude modulation(QAM) isa combination of ___________. A) ASK and FSK B) ASK and PSK C) PSK and FSK D) none of the above

Last Answer : ASK and PSK

Description : Bits can be sent over guided and unguided media as analog signal by ___________ a. digital modulation b. amplitude modulation c. frequency modulation d. phase modulation

Last Answer : a. digital modulation

Description : what is angle and amplitude modulation? what is noise in modulation?

Last Answer : Ans- modulation means change. to send a message of low frequency to a far distance we use a carrier of high frequency to carry the message. while transfering we change some parameters of ... is an unwanted signal which enter in signal while transfering a signal and makes the signal distorted.

Description : What, if any, noise susceptibility advantage exists for pulse-amplitude modulation over analog amplitude modulation?

Last Answer : Both are susceptible to noise and interference

Description : With a single modulating tone, what is the amplitude of the sideband frequencies at 100-percent modulation?

Last Answer : One-half the amplitude of the carrier.

Description : What is amplitude modulation?

Last Answer : Any method of modulating an electromagnetic carrier frequency by varying its amplitude in accordance with the intelligence.

Description : n digital modulation, it is similar to standard amplitude modulation except there is only two amplitudes possible.

Last Answer : amplitude shift keying

Description : A pulse modulation technique as the width of a constant amplitude pulse is varied proportional to the amplitude of the analog signal at the time the signal is sampled.

Last Answer : PWM, PLM, PDM

Description : Pulse – amplitude modulation signals are multiplexed by using

Last Answer : FET switches

Description : Describe amplitude shift keying (ASK) modulation with suitable circuit diagram.

Last Answer : Explanation:- ASK MODULATOR: The process where a binary information signal directly modulates the amplitude of an analog carrier. The digital signal is used to switch the carrier between amplitude levels is ... Block diagram of ASK Transmitter / ASK modulator:-  Waveforms:- 

Description : What is the full form of ‘AM’ regarding radio broadcasting? (1) Amplitude Movement (2) Anywhere Movement (3) Amplitude Matching (4) Amplitude Modulation

Last Answer : Amplitude Modulation

Description : Amplitude modulation is used for broadcasting because   (A) it is move noise immune than other modulation systems (B) compared with other systems it requires less transmitting power (C) ... receiver complexity (D) no other modulation system can provide the necessary bandwidth for high fidelity.

Last Answer : Amplitude modulation is used for broadcasting because its use avoids receiver complexity 

Description : In amplitude modulation scheme, the over-modulation (A) is desired phenomenon (B) helps in signal recovery (C) is undesired phenomenon (D) Envelope of AM maintains the shape of the baseband signal

Last Answer : In amplitude modulation scheme, the over-modulation is desired phenomenon

Last Answer : When large amount of power is required, a push pull amplifier is designed for operation as class B.

Description : The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The centre of the arc is at (10, 5). Which one of the following NC tool path command performs the ... b.N010 GO3 X10 Y10 X5 Y5 R5 c.N010 GO1 X5 Y5 X10 Y10 R5 d.N010 GO2 X5 Y5 X10 Y10 R5

Last Answer : a.N010 GO2 X10 Y10 X5 Y5 R5

Description : Which are the operation of versatility: a. exchange of information with the outside world via I/O device b. Transfer of data internally with in the central processing unit c. Performs of the basic arithmetic operations d. = Allof these

Last Answer : d. = Allof these

Description : Which are the operation that a computer performs on data that put in register: a. Register transfer b. Arithmetic c. Logical d. Allof these

Last Answer : d. Allof these

Description : RestTemplate class method which performs an HTTP HEAD operation. a) headForHeaders(String, Object…) b) getForObject(String, Class, Object…) c) postForLocation(String, Object, Object…) d) postForObject(String, Object, Class, Object…)

Last Answer : headForHeaders(String, Object…)

Description : In 8085, which of the following performs: load register pair immediate operation? (1) LDAX rp (2) LHLD addr (3) LXI rp, data (4) INX rp

Last Answer : Answer: 3

Description : Claude Shannon described the operation of electronic switching circuits with a system of mathematical logic called _____________ a) LISP b) XLISP c) Neural networking d) Boolean algebra

Last Answer : c) Neural networking

Description : What is Software ? Set of computer programs, procedures and possibly associated document concerned with the operation of data processing. A set of compiler instructions A mathematical formula None of above

Last Answer : Set of computer programs, procedures and possibly associated document concerned with the operation of data processin

Description : Which of the following antennas is used for testing and adjusting a transmitter for proper modulation, amplifier operation and frequency accuracy? A. Elementary B. Real C. Isotropic D. Dummy

Last Answer : D. Dummy

Description : The receptor transduction mechanism with the fastest time-course of response effectuation is: A. Adenylyl cyclase-cyclic AMP pathway B. Phospholipase C-IP3: DAG pathway C. Intrinsic ion channel operation D. Protein synthesis modulation

Last Answer : C. Intrinsic ion channel operation

Description : has amplitude of vibration is 200mm and frequency of operation is 400 cycle/ sec. b. Acme tooth harrow c. Blade harrow d. None of the above

Last Answer : Ans- a. Reciprocating power harrow

Description : State the need of signal conditioning and signal processing .List applications of instrumentation amplifier.

Last Answer : * In an instrumentation system, a transducer is used for sensing various parameters. The output of transducer is an electrical signal proportional to the physical quantity sensed such as pressure, ... monitoring and control 5) Light intensity meter 6) Measurement of flow and thermal conductivity

Description : Indicate which one of the following is NOT an advantage of FM over AM? (1) Better noise immunity is provided (2) Lower bandwidth is required (3) The transmitted power is more useful (4) Less modulating power is required 

Last Answer : Indicate which one of the following is NOT an advantage of FM over AM? (1) Better noise immunity is provided (2) Lower bandwidth is required (3) The transmitted power is more useful (4) Less modulating power is required 

Description : Theoretical bandwidth requirement for FM system is: (1) Same as that of the modulating signal bandwidth (2) Twice of modulating signal Bandwidth (3) Thrice as of modulating signal Bandwidth (4) Infinite 

Last Answer : Theoretical bandwidth requirement for FM system is: Infinite

Description : The Ku frequency band used in satellite communication (for uplink and downlink) is: (1) 14 GHz and 11 GHz (2) 30 GHz and 20 GHz (3) 70 GHz and 50 GHz (4) 60 GHz and 45 GHz 

Last Answer : The Ku frequency band used in satellite communication (for uplink and downlink) is: 14 GHz and 11 GHz 

Description : The disadvantage of CDMA system is: (1) Higher MAI with more user count. (2) That it needs least power consumption. (3) That it needs coherent signal. (4) That it is not suitable with PSK systems 

Last Answer : The disadvantage of CDMA system is: Higher MAI with more user count. 

Description : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

Last Answer : Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

Description : The use of non-uniform quantization leads to: (1) Reduction in transmission bandwidth. (2) Increase in maximum SNR. (3) Increase in SNR for signal levels. (4) Simplification of quantization process. 

Last Answer : The use of non-uniform quantization leads to:  Increase in SNR for signal levels.