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MMLU-Pro / 11880 / Suppose an antenna has a power input of 40…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

Suppose an antenna has a power input of 40\piW and an efficiencyof 98 percent. If the radiation intensity has been foundto have a maximum value of 200 W/unit solid angle, findthe directivity and gain of the antenna.

category

engineering

options

  1. Directivity: 30.41 or 20.10 dB, Gain: 30 or 20.01 dB
  2. Directivity: 12.41 or 7.10 dB, Gain: 12 or 7.01 dB
  3. Directivity: 25.41 or 15.10 dB, Gain: 25 or 15.01 dB
  4. Directivity: 10.41 or 5.10 dB, Gain: 10 or 5.01 dB
  5. Directivity: 40.41 or 30.10 dB, Gain: 40 or 30.01 dB
  6. Directivity: 35.41 or 25.10 dB, Gain: 35 or 25.01 dB
  7. Directivity: 18.41 or 11.10 dB, Gain: 18 or 11.01 dB
  8. Directivity: 15.41 or 9.10 dB, Gain: 15 or 9.01 dB
  9. Directivity: 22.41 or 14.10 dB, Gain: 22 or 14.01 dB
  10. Directivity: 20.41 or 13.10 dB, Gain: 20 or 13.01 dB

src

stemez-ElectronicCommunications

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Source and history

upstream_id / Original problem ID
11880
task_id
cb64a33b-9004-55a4-a397-0a820d93af71
task_key
default--test--11880
task_revision_id
1
config / split
default / test

Official source

initial import