46. A reflex klystron functions as:
    

1. 1. Microwave oscillator
      

   
   
   

   2. Microwave amplifier
      

   
   
   

   3. Both as microwave amplifier and oscillator
      

   
   
   

   4. A high gain cavity

   
   
   

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   NA

   Correct Option: A

   NA

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47. The transmit time in the repeller space of a reflex klystron must be:
    

1. 1. n cycles

   
   
   

   2. 	n +	1		cycles
      		4

      
      

   
   
   

   3. 	n +	3		cycles
      		4

   
   
   

   4. 	n +	1		cycles
      		2

   
   
   

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   NA

   Correct Option: C

   NA

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48. The modes in a reflex klystron:
    

1. 1. Give the same frequency but different transit times

   
   
   

   2. Result from excessive transit time across the resonator gap
      

   
   
   

   3. Are caused by spurious frequency modulation
      

   
   
   

   4. Are just for theoretical considerations

   
   
   

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   NA

   Correct Option: A

   NA

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49. The secondary cavity in a two cavity klystron is called the:
    

1. 1. Buncher cavity
      

   
   
   

   2. Catcher cavity
      

   
   
   

   3. Velocity modulation cavity
      

   
   
   

   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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50. Strapping is used in cavity magnetrons to:
    

1. 1. Prevent mode jumping
      

   
   
   

   2. Ensure bunching
      

   
   
   

   3. Improve bandwidth
      

   
   
   

   4. Prevent cathode back heating

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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