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Measurement and Instrumentation

Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Rc/Rb).Ra.
 (Ra/Rc).Rb.
 (Rb/Rc).Ra.
 (Rc/Ra).Rb.

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Measurement and Instrumentation
For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from

 Any of above.
 A source other than the source of unknown voltage.
 A battery.
 The same source as the unknown voltage.

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Measurement and Instrumentation
A pressure measurement instrument is calibrated between 10 bar and 260 bar. The scale span of the instrument is

 10 bar.
 260 bar.
 270 bar.
  250 bar.

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Measurement and Instrumentation
Some wire- wound resistors have bifilar winding. This type of winding is used to

Double the power rating of the resistor
Increase the thermal stability
Reduce the tolerance
Reduce the inductance of winding

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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%
 2%
 3.33%
 1%

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Measurement and Instrumentation
The ratio of change in output to the change in the input is called

 precision
 repeatability
 sensitivity
 resolution

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