16. Which of the following does not exhibit piezoelectric effect?

1. 1. Rochelle salt

   
   
   

   2. Tourmaline

   
   
   

   3. Quartz

   
   
   

   4. Diamond

   
   
   

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   NA

   Correct Option: D

   NA

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17. The oscillator shown in fig. below is a:
    
    
    

1. 1. Miller crystal oscillator

   
   
   

   2. Shunt fed Hartley oscillator

   
   
   

   3. Electron coupled oscillator

   
   
   

   4. Tuned collector oscillator

   
   
   

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   NA

   Correct Option: D

   NA

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18. Which piezoelectric material is used in RF oscillators?

1. 1. Rochelle salt

   
   
   

   2. Quartz

   
   
   

   3. Tourmaline

   
   
   

   4. Any of these

   
   
   

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   NA

   Correct Option: B

   NA

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19. A monostable multivibrator requires:

1. 1. no driving pulse

   
   
   

   2. one driving pulse for generation of each cycle of wave form

   
   
   

   3. two driving pulses for generation of each cycle of wave form

   
   
   

   4. four driving pulses for generation of each cycle of wave form

   
   
   

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   NA

   Correct Option: B

   NA

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20. A multivibrator can be used as a:

1. 1. cavity resonator

   
   
   

   2. harmonic generator

   
   
   

   3. waveform modifier

   
   
   

   4. any of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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