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Measurement and Instrumentation

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

Moving iron
Electrostatic
PMMC
Hot wire

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Measurement and Instrumentation
A CRO can display

DC signals
AC signals
Time invariant signals
Both AC and DC signals

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Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.065
 ± 0.056
 ± 0.045
 ± 0.054

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Measurement and Instrumentation
Which of the following devices should be used for accurate measurement of low D.C. voltage?

None of these
Small range thermocouple voltmeter
Small range moving coil voltmeter
C. potentiometer

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Measurement and Instrumentation
The main advantage of Anderson bridge over Maxwell bridge is that

 attaining balance condition is easier.
  reduction of the cost.
 measures high Q inductors.
 balance equation independent of frequency.

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

  10√3.
 20√3.
 10.
 20.

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