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Measurement and Instrumentation

Measurement and Instrumentation
Which amplifier in used in an electronic amplifier?

 Power amplifier.
 Wideband amplifier.
 Butter amplifer.
 Differential amplifier.

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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

 1.5 V.
 1 V.
 1.7 V.
 1.34 V.

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Measurement and Instrumentation
The error of an instrument is normally given as a percentage of

Mean value
Rms value
Full-scale value
Measured value

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Measurement and Instrumentation
The resistance can be measured most accurately by

Bridge method
Multimeter
Voltmeter-ammeter method
Megger

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Measurement and Instrumentation
A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit under standard condition. The maximum possible percentage error in the reading is

 1%
 2%
 1.5%
 2.5%

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Measurement and Instrumentation
The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ?

 1.5% & 99%
 1.25% & 98.25%
 1.5% & 98.75%
 1.25% & 98.75%

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