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Measurement and Instrumentation

Measurement and Instrumentation
What is the expression for momentum?

 force × displacement
 change of velocity / time
 mass × velocity
 mass × acceleration

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Measurement and Instrumentation
The terminals across the source are ______________________________ if a current source is to be neglected.

 short circuited
  replaced by a capacitor
 open circuited
  replaced by a source resistance

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Measurement and Instrumentation
Commonly used instruments in power system measurement are

Rectifier
Induction
Electrostatic
Moving coil or iron

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Measurement and Instrumentation
The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ?

 1.5% & 99%
 1.5% & 98.75%
 1.25% & 98.25%
 1.25% & 98.75%

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Measurement and Instrumentation
To measure high frequency currents, we mostly use ______ ammeter.

Dynamometer
Hot wire
Moving iron
Thermocouple

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Measurement and Instrumentation
Swamping resistance is used to compensate

 error due to strong magnetic field.
 both A and B.
 none of these.
 error due to temperature true variations.

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MORE MCQ ON Measurement and Instrumentation

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