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Measurement and Instrumentation

Measurement and Instrumentation
If the instrument is to have a wide range, the instrument should have

Square-law scale
Linear scale
Logarithmic scale
Exponential scale

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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

 94.6o.
  4.6o.
 175.4o.
 85.4o.

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Measurement and Instrumentation
The scale of a rectifier instrument is

Linear
Non-linear
Either linear or non linear
None of the listed here

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Measurement and Instrumentation
Symmetric errors are

Instrument errors
All of the listed here
Observational errors
Environment errors

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Measurement and Instrumentation
To measure the flux, devices used are based on

Photo-voltaic effect
Hall effect
Piezo-electric effect
Voltaic effect

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Measurement and Instrumentation
The given figure shows wein bridge connection for frequency measurement. C and R are variables and gang together. For balanced condition the expression for frequency is f = 1/2πCR when

 R1 = 3R2.
 R1 = R2/2.
 R1 = R2.
 R1 = 2R2.

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MORE MCQ ON Measurement and Instrumentation

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