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Measurement and Instrumentation

Measurement and Instrumentation
A thermo couple ammeter gives full scale deflection of 10 A, when it reads one fifth of the scale, the current will be

 2 A.
 5.78 A.
  4.47 A.
 4 A.

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Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 (2 + √3/2)V.
 2 V.
 5 V.
 0 V.

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

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Measurement and Instrumentation
In eddy current damping, disc or former is made of a material that is a

Conductor but non magnetic
Non conductor and non magnetic
Conductor but magnetic
Non conductor but magnetic

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Measurement and Instrumentation
Null type recorders are

 LVDT recorders.
 bridge recorders.
 any one of the above.
 potentiometric recorders.

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Measurement and Instrumentation
Which of following are needed both for protection and metering?

 Power factor meters.
 Instrument transformer.
 Wattmeters.
 Energy meter.

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