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Measurement and Instrumentation

Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

Low frequencies
High frequencies
Power frequencies
High load on the transformer

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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
None of the listed here
Deflecting
Controlling

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Measurement and Instrumentation
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

 25 mA.
 80 mA.
  40 mA.
 50 mA.

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Measurement and Instrumentation
The thermocouple instruments do not have

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

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

One of the meters out of the range and other 100V
300V each
360V and 240V
400V and 200V

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Measurement and Instrumentation
A 0 - 200 V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 50 V. What is the limiting error?

 4%
 2%
 3%
 5%

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