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Measurement and Instrumentation

Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 (2 + √3/2)V.
 0 V.
 2 V.
 5 V.

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Measurement and Instrumentation
Which of the following essential featuresis possessed by an indicating instrument?

All of the listed here
Damping device
Controlling device
Deflecting device

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 1) A
 (400 ± 1.5) A
 (400 ± 2.24) A
 (400 ± 3) A

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Measurement and Instrumentation
Electrostatic instruments are normally used for

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

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Temperature
 Both Voltage and Temperature
 Voltage
 Current

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

 1.
 3.
 2.
 4.

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