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MMLU-Pro / 11327 / 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\pi W and an efficiencyof 98 percent. Also, suppose that the radiation intensityhas been found to have a maximum value of 200 W/unit solid angle.Find the directivity and gain of the antenna.

category

engineering

options

  1. Directivity is 12.7 or 11.0 dB, Gain is 12 or 10.8 dB
  2. Directivity is 20.4 or 13.1 dB, Gain is 20 or 13.0 dB
  3. Directivity is 30.4 or 15.1 dB, Gain is 30 or 15.0 dB
  4. Directivity is 35.4 or 15.5 dB, Gain is 35 or 15.4 dB
  5. Directivity is 10.2 or 10.1 dB, Gain is 10 or 10.0 dB
  6. Directivity is 22.3 or 13.5 dB, Gain is 22 or 13.3 dB
  7. Directivity is 15.4 or 11.1 dB, Gain is 15 or 11.0 dB
  8. Directivity is 25.4 or 14.1 dB, Gain is 25 or 14.0 dB
  9. Directivity is 18.6 or 12.7 dB, Gain is 18 or 12.5 dB
  10. Directivity is 28.8 or 14.6 dB, Gain is 28 or 14.5 dB

src

stemez-Electromagnetics

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Source and history

upstream_id / Original problem ID
11327
task_id
61b93324-387c-56cf-a5d9-67d08277bee0
task_key
default--test--11327
task_revision_id
1
config / split
default / test

Official source

initial import