11. DVM is the abbreviation for which of the following?
    

1. 1. Digital voltmeter
      

   
   
   

   2. Digital volume meter
      

   
   
   

   3. Divider voltage meter
      

   
   
   

   4. Digital vacuum meter

   
   
   

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1. View Hint View Answer Discuss in Forum

   DVM means digital voltmeter.

   Correct Option: A

   DVM means digital voltmeter.

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12. A, 0-150V voltmeter has a guaranteed accuracy of 1 per cent full-scale reading. The voltage measured by this instrument is 83V. The limiting error in per cent will be—
    

1. 1. 2·83%
      

   
   
   

   2. 1·83%
      

   
   
   

   3. 3·2%
      

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   Given voltmeter range 0–150V
   measured value = 83V
   The magnitude of the limiting error
   = 0·01 × 150V = 1·5V
   The percentage error at a meter indication of 83V will be
   

   =	1.5	× 100 = 1.81 %
   	83

   Correct Option: B

   Given voltmeter range 0–150V
   measured value = 83V
   The magnitude of the limiting error
   = 0·01 × 150V = 1·5V
   The percentage error at a meter indication of 83V will be
   

   =	1.5	× 100 = 1.81 %
   	83

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13. AC current cannot be measured directly by:
    

1. 1. Hot wire ammeter
      

   
   
   

   2. Moving iron ammeter
      

   
   
   

   3. Moving coil ammeter
      

   
   
   

   4. Thermocouple type ammeter

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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14. Which of the following meters has the best accuracy?
    

1. 1. Moving iron meter
      

   
   
   

   2. Moving coil meter
      

   
   
   

   3. Rectifier type meter
      

   
   
   

   4. Induction type

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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15. Which of the following instruments will read true rms value irrespective of the signal waveform?
    

1. 1. Moving coil meter
      

   
   
   

   2. Moving iron meter
      

   
   
   

   3. Electronic meter
      

   
   
   

   4. Thermocouple meter

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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