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Measurement and Instrumentation

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.
 0 V.
 5 V.
 2 V.

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Measurement and Instrumentation
Which of the following instruments can be used to measure AC current only?

Moving iron ammeter
Permanent Magnet Type ammeter
Induction type ammeter
Moving iron voltmeter

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Measurement and Instrumentation
The measured value of a resistance is 10.25 ohm, whereas its value of 10.22 ohm. What is absolute error of the measurement?

 0.01 ohm.
  0.03 ohm.
 15.36 ohm.
 10.26 ohm.

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Measurement and Instrumentation
A ______ device prevents the oscillation of the moving statem and enables the latter to reach its final position quickly

Damping
Controlling
None of the listed here
Deflecting

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Measurement and Instrumentation
A high frequency AC signal is applied to a PMMC instrument. The RMS value of the AC signal is 2V, the reading of the instrument is

 2V.
 2√2V.
 √2V.
 Zero.

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Measurement and Instrumentation
Which one of the following meters has maximum loading effect on the circuit under measurement ?

 100 Ω/volt
 1 MΩ/volt
 1000 Ω/volt
 10 MΩ/volt

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