Electronic Devices Circuits Noise Online Exam Quiz
Electronic Devices Circuits Noise GK Quiz. Question and Answers related to Electronic Devices Circuits Noise. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Noise
If the amplifier is sold to engineering public, the noise figure that would be quoted in a catalog is
Options
A : 0.46
B : 0.94
C : 1.83
D : 2.93
A system has three stage cascaded amplifier each stage having a power gain of 10 dB and noise figure of 6 dB. the overall noise figure is
Options
A : 1.38
B : 6.8
C : 4.33
D : 10.43
A receiver is operated at a temperature of 300 K. The transistor used in the receiver have an average output resistance of 1 k. The Johnson noise voltage for a receiver with a bandwidth of 200 kHz is
Options
A : 1.8 µV
B : 8.4 µV
C : 4.3 µV
D : 12.6 µV
A mixer stage has a noise figure of 20 dB. This mixer stage is preceded by an amplifier which has a noise figure of 9 dB and an available power gain of 15 dB. The overall noise figure referred to the input is
Options
A : 11.07
B : 18.23
C : 56.43
D : 97.38
A resistor R 1 k is maintained at 17C. The rms noise voltage generated in a bandwidth of 10 kHz is
Options
A : 16 x 10(-14) V
B : 0.4 µV
C : 4 µV
D : 16 x 10(-18) V
In a receiver the input signal is 100 V, while the internal noise at the input is 10 V. With amplification the output signal is 2 V, while the output noise is 0.4 V. The noise figure of receiver is
Options
A : 2
B : 0.5
C : 0.2
D : None of the mentioned
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?
Options
A : 203 K
B : 215 K
C : 235 K
D : 255 K
The Te is
Options
A : 70 K
B : 110 K
C : 149 K
D : 240 K
If a matched attenuator with a loss of 3.2 dB is placed between the source and the amplifier’s input, what is the operating spot noise figure of the attenuator amplifier cascade if the attenuator’s physical temperature is 290 K?
Options
A : 9 db
B : 11.3 db
C : 10.4 db
D : 13.3 db
What average operating noise figure results when the amplifier is used with an antenna of temperature 30 K?
Options
A : 9.54 db
B : 10.96 db
C : 11.23 db
D : 12.96 db
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