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Measurement and Instrumentation

Measurement and Instrumentation
To measure 5 volts, if one selects a 0-100 volt range voltmeter which is accurate with in ± 1%, then the error in this measurement may be up to

 ± 1.5%
 ± 7.5 %
 ± 20%
 ± 2.5%

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Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 240 Ohm.
 0.0012 Ohm.
 120 Ohm.
 0.0024 Ohm.

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Measurement and Instrumentation
To measure the flux, devices used are based on

Photo-voltaic effect
Hall effect
Voltaic effect
Piezo-electric effect

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

One of the meters out of the range and other 100V
300V each
400V and 200V
360V and 240V

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Measurement and Instrumentation
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

From the same source as the unknown voltage
From a source which is not the same as the unknown voltage
From a battery
Any of the above

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% more.
 0.4% less.
 0.2% less.
 0.4 more.

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MORE MCQ ON Measurement and Instrumentation

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