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MMLU-Pro / 11401 / For sea water with …

Problem

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question

For sea water with \gamma = 5 mhos/meter and\epsilon_r= 80, find the distance a radio signal can be transmitted at 25kcps and 25mcps, if the range is taken to be the distance at which 90 per cent of the wave amplitude is attenuated.

category

engineering

options

  1. 4.5 meters for 25kcps and 15 cm for 25mcps
  2. 5 meters for 25mcps and 20 cm for 25kcps
  3. 1 meter for 25kcps and 30 cm for 25mcps
  4. 3.22 meters for both 25kcps and 25mcps
  5. 2.3 meters for 25kcps and 10 cm for 25mcps
  6. 3.22 meters for 25mcps and 10 cm for 25kcps
  7. 2.5 meters for 25mcps and 5 cm for 25kcps
  8. 3.22 meters for 25kcps and 10 cm for 25mcps
  9. 3.22 cm for 25kcps and 10 meters for 25mcps
  10. 10 cm for both 25kcps and 25mcps

src

stemez-Electromagnetics

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Source and history

Official source

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