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Measurement and Instrumentation

Measurement and Instrumentation
Most sensitive galvanometer is

Vibration galvanometer
Elastic galvanometer
Duddle galvanometer
Spot ballastic galvanometer

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1.34 V.
 1 V.
 1.7 V.
 1.5 V.

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Measurement and Instrumentation
An instrument to be used for measurement and control should preferably have

Dead zone and dead time
Non-linear output
Linear output and fast response
A highly damped response

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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
 ± 0.045
 ± 0.054
 ± 0.056

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Measurement and Instrumentation
A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit under standard condition. The maximum possible percentage error in the reading is

 2%
 2.5%
 1.5%
 1%

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Measurement and Instrumentation
A thermometer having first order dynamics is subjected to a sudden temperature change of 30oc to 150oc. If it has he time constant of 5 sec, what temperature will be indicated by after 5 sec?

 30o.
 63.25o.
 105.6o.
 150o.

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