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Measurement and Instrumentation

Measurement and Instrumentation
The maximum percentage error in the sum of two voltage measurements when V1 = 100V ± 1% and V2 = 80V ± 5% is

 ± 6%
 ± 2.8%
 ± 4%
 ± 3%

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Measurement and Instrumentation
An induction meter can handle current upto

10 A
30 A
100 A
60 A

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Measurement and Instrumentation
The electrical power to a megger is provided by

Any of the listed here
Ac generator
Permanent magnet dc generator
Battery

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Measurement and Instrumentation
The range of a moving iron ac ammeter is extended by

A multiplier
None of the listed here
Changing number of turns of operating coil
A shunt

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Measurement and Instrumentation
No eddy current and hysteresis losses occur in

PMMC instruments
Electrodynamo meter instruments
Moving iron instruments
Electrostatic instruments

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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 ?

 ± 0.054
 ± 0.045
 ± 0.065
 ± 0.056

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