131. The sensitivity of an instrument is the

1. 1. smallest increment in the input that can be detected with certainty

   
   
   

   2. largest input change to which the instrument fails to respond

   
   
   

   3. ratio of the change in the magnitude of the output to the corresponding change in the magnitude of the input

   
   
   

   4. closeness of the output values for repeated applications of a constant input

   
   
   

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1. View Hint View Answer Discuss in Forum

   Sensitivity of an instrument is ratio of the change in the magnitude of the output to the corresponding change in the magnitude of the input.

   Correct Option: C

   Sensitivity of an instrument is ratio of the change in the magnitude of the output to the corresponding change in the magnitude of the input.

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132. ‘Creep’ is energy meters can be prevented by

1. 1. using extra turns on the voltage coil

   
   
   

   2. having two holes on opposite sides of the disc

   
   
   

   3. using a stronger brake magnet

   
   
   

   4. using steel laminations of high permeability

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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133. The “accuracy” of a measuring instrument is determined by

1. 1. closeness of the value indicated by it to the correct value of the measurand

   
   
   

   2. repeatability of the measured value

   
   
   

   3. speed with which the instruments’s reading approaches the final value

   
   
   

   4. least change in the value of the measurand that could be detected by the instrument

   
   
   

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1. View Hint View Answer Discuss in Forum

   The “accuracy” of measuring instrument is determined by the closeness of the value indicated by it to the correct value of the measurand.

   Correct Option: A

   The “accuracy” of measuring instrument is determined by the closeness of the value indicated by it to the correct value of the measurand.

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134. DC volt age of the order of a few mV can be measured accurately using a/an

1. 1. moving coil voltmeter

   
   
   

   2. null-balancing potentiometer.

   
   
   

   3. moving iron voltmeter

   
   
   

   4. electrostatic voltmeter

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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135. If a dynamometer type wattmeter is connected in an ac circuit, the power indicated by the wattmeter will be

1. 1. volt-ampere product

   
   
   

   2. average power

   
   
   

   3. peak power

   
   
   

   4. instantaneous power

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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