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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following cannot be measured by multimeters?

Current
Frequency
Voltage
Resistance

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% less.
 0.4 more.
 0.4% less.
 0.2% more.

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Measurement and Instrumentation
A voltmeter using thermocouple measures

 Peak to peak value.
  rms value.
 Peak value.
 Average value.

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Measurement and Instrumentation
The errors introduced by an instrument fall in which category ?

 Random errors
 Environmental errors
 Systematic errors
 Gross errors

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Measurement and Instrumentation
Electrostatic instruments are used as

Ammeters only
Voltmeters only
Wattmeter only
Both ammeter and voltmeter

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Measurement and Instrumentation
______ movement is most expensive.

Dynamometer
None of the listed here
Moving iron
D'Arsonval movement

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