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Measurement and Instrumentation

Measurement and Instrumentation
The dynamometer principle can be used for

 voltmeter only.
 ammeter only.
 wattmeter only.
 ammeter, voltmeter and wattmeter.

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Measurement and Instrumentation
A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be

 500 Hz.
 250 Hz.
 400 Hz.
 625 Hz.

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Measurement and Instrumentation
What is the expression for acceleration?

 Mass x acceleration
 Force x displacement
 Change in velocity / time
 Mass x velocity

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Measurement and Instrumentation
A spring controlled indicating instrument has a deflection of 90deg for maximum current I. The corresponding deflection for a gravity controlled instrument is

90°
120°
30°
0°

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Measurement and Instrumentation
______ instruments are most sensitive.

Permanent magnet moving coil
Dynamometer
Hot wire
Moving iron

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Measurement and Instrumentation
Figure show an RC potentiometer to measure AC voltage. It is desire that Vo/Vi should be independent of frequency. The value of C shoud be

 10 µF.
 11 µF.
 0.09 µF.
 0.1 µF.

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