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Measurement and Instrumentation

Measurement and Instrumentation
For measurement of high direct voltage, one would use _____ voltmeter.

Hot wire
Electrostatic
PMMC
Moving iron

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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

 2 %.
 3.33 %.
  2.66 %.
 1 %.

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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

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

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Measurement and Instrumentation
A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

 First adjust R2 and then adjust R4.
 First adjust R4 and then adjust R1.
 First adjust R4 and then adjust R2.
 First adjust R2 and then adjust R3.

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Measurement and Instrumentation
An induction wattmeter can be used for

Ac only
Any of the listed here
Dc only
Both DC and AC

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Measurement and Instrumentation
The absolute measurement of resistance is done by

Ohm’s law method
Lorenz method
Bridge Method
Rayleigh method

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