GATE ECE (Electronics) Test: Noise Free Online Test 2026
MCQ Practice Test & Solutions: Test: Noise (20 Questions)
You can prepare effectively for Electronics and Communication Engineering (ECE) GATE ECE (Electronics) Mock Test Series 2027 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Noise ". These 20 questions have been designed by the experts with the latest curriculum of Electronics and Communication Engineering (ECE) 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 60 minutes
- - Number of Questions: 20
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An amplifier has a standard spot noise figure F0 = 6.31 (8.0 dB). The amplifier, that is used to amplify the output of an antenna have antenna temperature of Ta = 180 K
Que: The effective input noise temperature of this amplifier is
Detailed Solution: Question 1
An amplifier has a standard spot noise figure F0 = 6.31 (8.0 dB). The amplifier, that is used to amplify the output of an antenna have antenna temperature of Ta = 180 K
Que: The operating spot noise figure is
Detailed Solution: Question 2
An amplifier has three stages for which Te1 = 200 K (first stage), Te2 = 450 K, and Te3 = 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?
Detailed Solution: Question 3
An amplifier has an operating spot noise figure of 10 dB when driven by a source of effective noise temperature 225 K.
Que: The standard spot noise figure of amplifier is
Detailed Solution: Question 4
An amplifier has an operating spot noise figure of 10 dB when driven by a source of effective noise temperature 225 K.
Que: If a matched attenuator with a loss of 3.2 dB isplaced between the source and the amplifier's input,what is the operating spot noise figure of the attenuator's amplifier cascade if the attenuator's physicaltemperature is 290 K ?
Detailed Solution: Question 5
An amplifier has an operating spot noise figure of 10 dB when driven by a source of effective noise temperature 225 K.
Que: In previous question what is the standard spot noisefigure of the cascade ?
Detailed Solution: Question 6
Omega Electronics sells a microwave receiver
(A) having an operating spot noise figure of 10 dB when driven by a source with effective noise temperature 130 K Digilink
(B) sells a receiver with a standard spot noise figure of 6 dB. Microtronics
(C) sells a receiver with standard spot noise figure of 8 dB when driven by a source with effective noise temperature 190 K. The best receiver to purchase is
Detailed Solution: Question 7
An amplifier has three stages for which Te1 = 150 K (first stage), Te3 = 350 K, and Te3 = 600 K (output stage). Available power gain of the first stage is 10 and overall input effective noise temperature is 190 K
Que: The available power gain of the second stage is
Detailed Solution: Question 8
An amplifier has three stages for which Te1 = 150 K (first stage), Te3 = 350 K, and Te3 = 600 K (output stage). Available power gain of the first stage is 10 and overall input effective noise temperature is 190 K
Que: The cascade's standard spot noise figure is
Detailed Solution: Question 9
An amplifier has three stages for which Te1 = 150 K (first stage), Te3 = 350 K, and Te3 = 600 K (output stage). Available power gain of the first stage is 10 and overall input effective noise temperature is 190 K
Que: What is the cascade's operating spot noise figure when used with a source of noise temperature Ts = 50 K
Detailed Solution: Question 10
Three network are cascaded. Available power gains are G1 = 8, G2 = 6 and G3 = 20. Respective input effective spot noise temperature are Te1 = 40 K, Te2 = 100 K and Te3 =180 K.
Detailed Solution: Question 11
Three identical amplifier, each having a spot effective input noise temperature of 125 K and available power G are cascaded. The overall spot effective input noise temperature of the cascade is 155 K. The G is
Detailed Solution: Question 12
Three amplifier that may be connected in any order in a cascade are defined as follows:
The sequence of connection that will give the lowest overall effective input noise temperature for the cascade is
Detailed Solution: Question 13
What is the maximum average effective input noise temperature that an amplifier can have if its average standard noise figure is to not exceed 1.7 ?
Detailed Solution: Question 14
An amplifier has an average standard noise figure of 2.0 dB and an average operating noise figure of 6.5 dB when used with a source of average effective source temperature 
The is
The is Detailed Solution: Question 15
An antenna with average noise temperature 60 K connects to a receiver through various microwave elements that can be modeled as an impedance matched attenuator with an overall loss of 2.4 dB and a physical temperatures of 275 K. The overall system noise temperature of the receiver 
Que: The average effective input noise temperature of the receiver is
Detailed Solution: Question 16
An antenna with average noise temperature 60 K connects to a receiver through various microwave elements that can be modeled as an impedance matched attenuator with an overall loss of 2.4 dB and a physical temperatures of 275 K. The overall system noise temperature of the receiver
Que: The average operating noise figure of the attenuator-receiver cascade is
Detailed Solution: Question 17
If receiver has an available power gain of 110 dB and a noise band width of 10 MHz, the available output noise power of receiver is
Detailed Solution: Question 18
If antenna attenuator cascade is considered as a noise source, its average effective noise temperature is
Detailed Solution: Question 19
An amplifier when used with a source of average oise temperature 60 K, has an average operating noise figure of 5.
Que: The Te is
Que: The Te is
Detailed Solution: Question 20
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