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Measurement and Instrumentation

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

 logarithmic.
 expontial.
 square law.
 linear.

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Measurement and Instrumentation
The use of __________________ instruments is merely confined within laboratories as standardizing instrument.

  absolute.
 integrating.
 recording.
 indicating.

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Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.056
 ± 0.065
 ± 0.054
 ± 0.045

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Measurement and Instrumentation
The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

 ± 3.0%
 ±3.5%
 ± 1.5%
 ±0.5%

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Measurement and Instrumentation
Standard resistor ia made from

Nichrome
Silver
Manganin
Platinum

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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

 85.4o.
  4.6o.
 175.4o.
 94.6o.

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