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Measurement and Instrumentation

Measurement and Instrumentation
In a gravity controlled instrument, the deflection angle is proportional

Square of the measurand
Sine of the measurand
Measurand
Sine inverse of measurand

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Measurement and Instrumentation
A 10MHz CRO has

10MHz supply frequency
10MHz horizontal oscillator
5MHz sweep
10MHz vertical oscillator

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Measurement and Instrumentation
The errors introduced by an instrument fall in which category ?

 Gross errors
 Random errors
 Environmental errors
 Systematic errors

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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
Which one of the following meters has maximum loading effect on the circuit under measurement ?

 1000 Ω/volt
 1 MΩ/volt
 10 MΩ/volt
 100 Ω/volt

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Measurement and Instrumentation
A 50 Hz bar primary CT has a secondary with 500 turns. The secondary supplies 5 A current into a purely resistive burden of 1Ω. The magnetizing ampere-turn is 200. The phase angle between the primary and secondary current is

  4.6o.
 175.4o.
 94.6o.
 85.4o.

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