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Measurement and Instrumentation

Measurement and Instrumentation
Resistances can be measured with the help of

Wattmeters
Ohmmeters and resistance bridges
Voltmeters
Ammeters

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Measurement and Instrumentation
The internal resistance of an ammeter should be

Very small
Infinity
Medium
High

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Measurement and Instrumentation
The use of __________________ instruments is merely confined within laboratories as standardizing instrument.

 indicating.
 integrating.
 recording.
  absolute.

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Measurement and Instrumentation
The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures

Reactive power of R phase
Active power of Y phase
Power proportional to 3 phase power if the load is balanced
Active power in R phase

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Measurement and Instrumentation
Ampere is one of the

Derived units
Base units
Units used to measure charge
Supplementary units

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Measurement and Instrumentation
Induction type single phase energy meters measure electric energy in

kW
kWh
VAR
Wh

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