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Measurement and Instrumentation

Measurement and Instrumentation
A permanent magnet moving coil ammeter is connected in 50 Hz a. c. Circuit in which 5A current is flowing. The meter will read

None of the listed here
0 A
2.5 A
5 A

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Measurement and Instrumentation
For measuring a very high resistance we should use

Wheat stone bridge
Megger
Kelvin's double bridge
None of the listed here

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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

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

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Measurement and Instrumentation
The thermocouple instruments do not have

Independence of ambient temperature
High sensitivity
Absence of frequency error
High degree of measuring accuracy

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Measurement and Instrumentation
Commonly used instruments in power system measurement are

Moving coil or iron
Induction
Rectifier
Electrostatic

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Measurement and Instrumentation
The form factor in AC is the ratio of

Rms value to average value
Rms value to peak value
Peak value to rms value
Peak value to average value

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MORE MCQ ON Measurement and Instrumentation

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