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Measurement and Instrumentation

Measurement and Instrumentation
The rectifier instrument is not free from

Frequency error
Wave shape error
All of the listed here
Temperature error

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Measurement and Instrumentation
The limiting errors of measurement of power consumed by and the current passing through a resistance are ±1.5% and ±1% respectively. What is the limiting error ( in %) of measurement of resistance ?

 ± 1%
 ± 2.5%
 ± 1.5%
 ±3.5%

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Measurement and Instrumentation
A 50 Hz bar primary CT has a secondary with 500 turns. The secondary supplies 5 A current into a purely resistive burden of 1Ω. The magnetizing ampere-turn is 200. The phase angle between the primary and secondary current is

 175.4o.
 85.4o.
 94.6o.
  4.6o.

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Measurement and Instrumentation
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

 ± 1%
 ± 2.5%
 ± 3.5%
 ± 1.5%

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Measurement and Instrumentation
Which of the following is a variable displacement transducer?

 synchros
 potentiometer
 tachometer
None of these

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Measurement and Instrumentation
Which of the following quantities consists of S.I. unit as Hertz?

 Force
 Power
 Frequency
 Charge

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