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Measurement and Instrumentation

Measurement and Instrumentation
In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is

 1.
 none of above.
 0.
 0.5.

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Measurement and Instrumentation
The spring material used in a spring control device should have the following property.

Should non magnetic
All of the listed here
Should have low specific resistance
Most be of low temperature co-efficient

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Measurement and Instrumentation
Electrostatic instruments are normally used for

Low current measurements
Low voltage measurements
High current measurements
High voltage measurements

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Measurement and Instrumentation
A permanent magnet moving coil ammeter has a coil resistance of 99ohm and Full Scale DeflectionFSD. current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is

0.05mA
0.023mA
0.1mA
0.007mA

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Measurement and Instrumentation
A CRO can display

Time invariant signals
Both AC and DC signals
DC signals
AC signals

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Measurement and Instrumentation
Which of the two have same dimensions?

 Force and strain
 Force and stress
 Angular velocity and angular frequency
None of these

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