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MEASUREMENT AND INSTRUMENTATION

Measurement and Instrumentation
Piezoelectronic accelerometer

 Has a low natural frequency.
 Should use a monitoring source at low input impedance.
 Should be used for low frequency.
 Should be used for high frequencies above 100 Hz.

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Measurement and Instrumentation
A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 V it is standardised by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wires is 1000 ohm, then the value of the working current will be

 10 mA.
 0.5 mA.
 1mA.
 100 mA.

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

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

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% more.
 0.4 more.
 0.4% less.
 0.2% less.

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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

 1.34 V.
 1.5 V.
 1.7 V.
 1 V.

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