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Measurement and Instrumentation

Measurement and Instrumentation
In induction type ammeter, _____ damping is provided.

Eaddy current
None of the listed here
Air friction
Fluid friction

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Measurement and Instrumentation
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is

 2%
 3%
 1%
 4%

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Measurement and Instrumentation
In a CRO which of following is not a part of electron gun?

  X-Y plates
 Grid
 Accelerating anode
 Cathode

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Measurement and Instrumentation
An current of is measured with a thermocouple, 5 A full scale meter. What is the meter reading?

 2 A.
  3 A.
 5 A.
 2+3√2 A.

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Measurement and Instrumentation
Comparison methods are used

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

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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?

 2%
 3.33%
 5%
 1%

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