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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

 0.5.
 0.
 1.
 none of above.

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Measurement and Instrumentation
How many time-base circuits does a dual face CRO can have?

 3.
 4.
 1.
 2.

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured I1 = 150 ± 3A , I2 = 250 ± 4 A, where the limits of error are given as standard deviations. I is measured as

 (400 ± 1) A
 (400 ±5) A
 (400 ± 3) A
 (400 ± 2.24) A

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Measurement and Instrumentation
Most accurate measurement of unknown resistance will be by

Wheatstone bridge
Voltmeter and ammeter
Ohmmeter
Potentiometer

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Measurement and Instrumentation
An instrument to be used for measurement and control should preferably have

Linear output and fast response
Non-linear output
Dead zone and dead time
A highly damped response

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

1/49.99 ohms
1 Ohm
2 Ohms
49.99 Ohms

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