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Measurement and Instrumentation

Measurement and Instrumentation
A thermo couple ammeter gives full scale deflection of 10 A, when it reads one fifth of the scale, the current will be

 5.78 A.
 4 A.
 2 A.
  4.47 A.

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Measurement and Instrumentation
Ryall crest voltmeter is used for measurement of

Low frequency voltage
High DC voltage
High AC voltage
AC voltage of any form

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Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 2 µNm.
 100 µNm.
 1 µNm.
  200 µNm.

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Measurement and Instrumentation
Magnetic deflection is inversely proportional to

 (Voltage)1.5.
 Voltage.
 (Voltage)-0.5.
 (Voltage)2.

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Measurement and Instrumentation
Deflection method direct measurements are most widely used as these are

 most accurate.
 most simple.
 most simple and least time consuming.
 least time consuming.

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Measurement and Instrumentation
A 0 - 250V voltmeter has a guaranteed accuracy of 2% of full scale reading. What is the percentage of error if it measures 150V?

 5%
 1%
 2%
 3.33%

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