31. The number of comparators needed in a parallel conversion type 8-bit A to D convertor is __________

1. 1. 255

   
   
   

   2. 244

   
   
   

   3. 355

   
   
   

   4. 425

   
   
   

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1. View Hint View Answer Discuss in Forum

   For parallel conversion type A to D converter, number of comparators required = 2^N– 1,
   where, N is the number of bits = 2⁸ – 1 = 255

   Correct Option: A

   For parallel conversion type A to D converter, number of comparators required = 2^N– 1,
   where, N is the number of bits = 2⁸ – 1 = 255

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32. A 1 mA d’Arsonval movement has resistance of 100 Ω. It is to be converted to a 10 V voltmeter. The value of multiplier resistance is __________Ω

1. 1. 9900

   
   
   

   2. 9800

   
   
   

   3. 9000

   
   
   

   4. 8900

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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33. A zero to 300 V voltmeter has guaranteed accuracy of 1% full scale reading. The voltage measured by the instrument is 83V. The percent limiting error is ___________

1. 1. 3.62

   
   
   

   2. 3.25

   
   
   

   3. 3.85

   
   
   

   4. 3.66

   
   
   

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1. View Hint View Answer Discuss in Forum

   1% accuracy means that a maximum possible error of
   

   	300 × 1	= 3
   	100

   
   may be present in any reading. Since the deflection is 83V, therefore percent limiting error
   

   =	3	× 100 = 3.62
   	83

   Correct Option: A

   1% accuracy means that a maximum possible error of
   

   	300 × 1	= 3
   	100

   
   may be present in any reading. Since the deflection is 83V, therefore percent limiting error
   

   =	3	× 100 = 3.62
   	83

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34. A 1 mA ammeter has a resistance of 100Ω. It is to be converted to a 1 A ammeter. The value of shunt resistance is ________Ω

1. 1. 1.11

   
   
   

   2. 0.1001

   
   
   

   3. 1.001

   
   
   

   4. 5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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35. A milliammeter of resistance 100 Ω is connected in series with a circuit. Its power consumption is 0.1 mW. Supposing it is replaced with a milliammeter of 200Ω resistance the power consumption will be ________mW

1. 1. 2.2

   
   
   

   2. 2

   
   
   

   3. 0.2

   
   
   

   4. 0.5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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