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AIIMS 201925 May
Exam
AIIMS
Year
2019
Date
25 May
Subject
Physics
Chapter
Communication System

AIIMS 2019 · 25 May · Physics · Communication System

Assertion : Sky wave signals are used for long distance radio...

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals. Reason : The state of ionosphere varies from hour to hour, day to day and season to season.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

Since ionospheric properties change with time, sky wave signals are in general less stable than ground wave signals.
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