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Measurement and Instrumentation

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

 2.5%
 2%
 1.5%
 1%

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Measurement and Instrumentation
In a moving iron meter, the deflecting torque is proportional to

Sine of the measurand
Squareroot of the measurand
Square of the current through the coil
Current through the coil

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Measurement and Instrumentation
The internal resistance of an ammeter should be

Medium
High
Infinity
Very small

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Measurement and Instrumentation
A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be

 ± 8%
 ± 6%
 ± 7%
 ± 5%

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Measurement and Instrumentation
To increase Q factor of a coil, the wire should be

 long.
 long and thin.
 thin.
 thick.

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Measurement and Instrumentation
Standardization of potentiometer is done in order that, they become

 precise.
 accurate and direct reading.
 accurate.
 accurate and precise.

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MORE MCQ ON Measurement and Instrumentation

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