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Measurement and Instrumentation

Measurement and Instrumentation
An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

 5%
 3%
 6%
 4%

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Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

Low frequencies
High frequencies
Power frequencies
High load on the transformer

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Measurement and Instrumentation
A multirange instrument has

Multicoil arrangement
Variable turns of coil
Multirange meters inside the measurement system
Multiple shunt or series resistance inside the meter

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Measurement and Instrumentation
An analog ammeter is

 a recording instrument.
 an absolute instrument.
 a controlling instrument.
  an indicating instrument.

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Measurement and Instrumentation
In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is

 2.5 mm/Ω
 0.4 mm/Ω
 0.8 mm/Ω
 5.0 mm/Ω

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% more.
 0.4% less.
 0.4 more.
 0.2% less.

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MORE MCQ ON Measurement and Instrumentation

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