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Measurement and Instrumentation

Measurement and Instrumentation
Basically potential meter is a device for

Comparing two voltages
Measuring a voltage
Comparing two currents
Measuring a current

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Measurement and Instrumentation
A 1 mA meter is to be converted to 1 A ammeter. The meter resistance is 100 Ω. The value of shunt resistance

 1000 Ω.
 0.001 Ω.
 100 Ω.
 0.1001 Ω.

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Measurement and Instrumentation
An analog ammeter is

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

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Measurement and Instrumentation
Comparison methods are used

 because they take least time in measurement.
 because they are expensive.
 when a high accuracy of measurement is required.
 because they are most simple.

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Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 1 mA.
 3 mA.
 4 mA.
 2 mA.

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Measurement and Instrumentation
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are

 parallel.
 inclined at 30o.
 perpendicular.
 inclined at 60o.

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MORE MCQ ON Measurement and Instrumentation

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