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Measurement and Instrumentation

Measurement and Instrumentation
Induction wattmeter can measure

Both AC and DC
Dc power only
None of the listed here
Ac power only

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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

Any of the above
From a source which is not the same as the unknown voltage
From a battery
From the same source as the unknown voltage

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Measurement and Instrumentation
An ammeter is ______ instrument.

None of the listed here
A recording
An indicating
An integrating

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Measurement and Instrumentation
Which meter is suitable for the measurement of 10mV at 50MHz?

CRO
Moving coil voltmeter
VTVM
Moving iron voltmeter

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

300V each
360V and 240V
One of the meters out of the range and other 100V
400V and 200V

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

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