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Measurement and Instrumentation

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

0.1mA
0.05mA
0.007mA
0.023mA

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Measurement and Instrumentation
The repeat accuracy of an instrument can be judged from its

Dynamic error
Linearity error
Static error
Standard deviation of error

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Measurement and Instrumentation
The terminals across the source are ______________________________ if a current source is to be neglected.

 short circuited
  replaced by a source resistance
  replaced by a capacitor
 open circuited

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Measurement and Instrumentation
If two 300V full scale voltmeters V1 and V2 having sensitivities of 100 kOhm/V and 150 kOhm/V are connected in series to measure 500V then

 V1 = 200V and V2 = 300V.
 V1 = 300V and V2 = 200V.
 V1 = 250V and V2 = 250V.
 V1 = 0V and V2 = 0V.

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Measurement and Instrumentation
Which of the following devices may be used for extending the range of instruments?

All of the listed here
Potential transformers
Current transformers
Shunt

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Measurement and Instrumentation
Unit of deflection sensitivity of a CRO is

 V / mm.
 mm per mV.
 meter / volt.
 mm / V.

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