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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

 ± 4%
 ± 6%
 ± 2.8%
 ± 3%

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Measurement and Instrumentation
_______ instruments are those which measure the total quantity of the electricity delivered in a particular time.

Indicating
Integrating
Absolute
Recording

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Measurement and Instrumentation
Relative error is same as

None of these
 true error.
 absolute error.
 ratio of absolute error and true value.

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Measurement and Instrumentation
A permanent magnet moving coil ammeter has a coil resistance of 99ohm and Full Scale DeflectionFSD. current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is

0.05mA
0.007mA
0.1mA
0.023mA

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Measurement and Instrumentation
What is the expression for momentum?

 force × displacement
 mass × acceleration
 change of velocity / time
 mass × velocity

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Measurement and Instrumentation
A moving iron ammeter may be compensated for frequency errors by

A shunt resistance
Series resistance
Shunt capacitance
A series inductance

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