26. The correct relationship between α and β is:

1. 1. 1 – α =	1
      	1 + β

   
   
   

   2. α =	β
      	1 + β

   
   
   

   3. β =	α
      	1 - α

   
   
   

   4. None of these.

   
   
   

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1. View Hint View Answer Discuss in Forum

   β =	α
   	1 – α

   Correct Option: C

   β =	α
   	1 – α

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27. Region of the transistor which has highest conductivity is:

1. 1. Base

   
   
   

   2. Emitter

   
   
   

   3. Collector

   
   
   

   4. any of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   Since emitter has highest doping among base, emitter and collector. Therefore Also it will have highest conductivity.

   Correct Option: B

   Since emitter has highest doping among base, emitter and collector. Therefore Also it will have highest conductivity.

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28. The circuit shown in figure, behaves as:
    
    
    

1. 1. dc voltage follower

   
   
   

   2. dc coupled amplifier

   
   
   

   3. ac coupled amplifier

   
   
   

   4. logarithmic amplifier

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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29. The frequency at which the reactance of the two arms in a crystal gate are equal in the:

1. 1. Maximum attenuation frequency

   
   
   

   2. Zero

   
   
   

   3. Pole

   
   
   

   4. Zero attenuation frequency

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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30. Astable multivibrator are used as:

1. 1. Squaring circuit

   
   
   

   2. Voltage to frequency converter

   
   
   

   3. Comparator circuit

   
   
   

   4. Frequency to voltage converter

   
   
   

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1. View Hint View Answer Discuss in Forum

   Refer synopsis.

   Correct Option: A

   Refer synopsis.

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