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MMLU-Pro / 11954 / An amplifier of power gain 20 db has an input consisting of 100…

Problem

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question

An amplifier of power gain 20 db has an input consisting of 100\muWsignal power and 1\muWnoise power.If the amplifier contributesan additional 100\muWof noise, determine (a)theoutput signal to noise ratio, (b)thenoise factor and (c)thenoise figure.

category

engineering

options

  1. Output S/N ratio: 100, Noise factor: 2, Noise Figure: 3dB
  2. Output S/N ratio: 50, Noise factor: 2, Noise Figure: 2dB
  3. Output S/N ratio: 80, Noise factor: 2.5, Noise Figure: 4dB
  4. Output S/N ratio: 20, Noise factor: 2, Noise Figure: 6dB
  5. Output S/N ratio: 25, Noise factor: 4, Noise Figure: 6dB
  6. Output S/N ratio: 50, Noise factor: 1, Noise Figure: 3dB
  7. Output S/N ratio: 50, Noise factor: 1.5, Noise Figure: 1.76dB
  8. Output S/N ratio: 40, Noise factor: 3, Noise Figure: 4.77dB
  9. Output S/N ratio: 100, Noise factor: 1, Noise Figure: 0dB
  10. Output S/N ratio: 50, Noise factor: 2, Noise Figure: 3dB

src

stemez-ElectronicCommunications

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Source and history

upstream_id / Original problem ID
11954
task_id
d7f9ab90-cfd2-50ae-ae37-e1ad3ff21d3d
task_key
default--test--11954
task_revision_id
1
config / split
default / test

Official source

initial import