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Measurement and Instrumentation

Measurement and Instrumentation
A voltage of 2.70 V is being measured by an analog indicating instrument having a scale range of 0 – 5.0 V. If the instrument reads 2.65 V, then absolute error in measurement is

 0.25V
 0.05V
 0.01V
 0.01V

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Measurement and Instrumentation
Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is

 0.6 lead.
 0.917 lag.
 0.6 lag.
 0.917 lead.

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 an ellipse.
 sinisoidal.
  a circle.
 a straight line.

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Measurement and Instrumentation
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage

 1 %.
  2.66 %.
 2 %.
 3.33 %.

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Measurement and Instrumentation
Standard resistor ia made from

Manganin
Silver
Platinum
Nichrome

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

100 K ohms
100 ohms
99.99 K ohms
99.99 ohms

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