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Measurement and Instrumentation

Measurement and Instrumentation
No eddy current and hysteresis losses occur in

Electrostatic instruments
Moving iron instruments
PMMC instruments
Electrodynamo meter instruments

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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?

  40 mA.
 50 mA.
 25 mA.
 80 mA.

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Measurement and Instrumentation
A null type instrument as compared to a deflected type instrument has

 a faster response.
 a higher accuracy.
All of these
 a lower sensitivity.

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Measurement and Instrumentation
Which of the two have same dimensions?

None of these
 Force and stress
 Force and strain
 Angular velocity and angular frequency

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Measurement and Instrumentation
The use of thermocouple meters for AC measurement leads to scale which is

 square law.
 linear.
 expontial.
 logarithmic.

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Measurement and Instrumentation
In the bridge given in the figure, the reading of the high impedance voltmeter is

 4.20 V.
 Zero.
 6.66 V.
 - 3.33 V.

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