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Measurement and Instrumentation

Measurement and Instrumentation
A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads

50V
100V
111V
90V

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Measurement and Instrumentation
For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from

 The same source as the unknown voltage.
 A source other than the source of unknown voltage.
 Any of above.
 A battery.

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Measurement and Instrumentation
A moving coil permanent magnet instrument can be used as ______ by using a low resistance shunt.

Voltmeter
Ammeter
Ballastic galvanometer
Flux meter

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Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 1 mA.
 4 mA.
 3 mA.
 2 mA.

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Measurement and Instrumentation
In an Anderson bridge, the unknown inductance is measured in terms of

Known resistance
Known capacitance and resistance
Known inductance and resistance
Known inductance

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1.7 V.
 1 V.
 1.5 V.
 1.34 V.

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