26. Intelsat satellite works as a

1. 1. Transmitter

   
   
   

   2. Repeater

   
   
   

   3. Absorber

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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27. Which of the following device is full duplex ?

1. 1. Mobile phone

   
   
   

   2. Walky - talky

   
   
   

   3. Loudspeaker

   
   
   

   4. Radio

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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28. An n - type semiconductor is formed

1. 1. When germanium crystal is doped with an impurity containing three valence electron

   
   
   

   2. When germanium crystal is doped with an impurity containing five valence electron

   
   
   

   3. From pure germanium

   
   
   

   4. From pure silicon

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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29. Which of the following satellites is used in ship - to - shore and shore - to - shore and shore - to - ship communication ?

1. 1. Intelsat

   
   
   

   2. Marisat

   
   
   

   3. Comsat

   
   
   

   4. Telestar

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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30. Intelsat satellite is user for

1. 1. Radio communication

   
   
   

   2. Intercontinental communication

   
   
   

   3. Radar communication

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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