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Measurement and Instrumentation

Measurement and Instrumentation
Electrostatic instruments are used as

Voltmeters only
Ammeters only
Wattmeter only
Both ammeter and voltmeter

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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.
 1.34 V.
 1.5 V.
 1 V.

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Measurement and Instrumentation
Piezoelectric effect is carried out in

  m derived.
  composite filter.
  constant k prototype.
  crystal filter.

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Measurement and Instrumentation
Commonly used standard capacitor is

Electrostatic type
Concentric cylindrical type
Multiplate parallel plate type
Spherical type

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Measurement and Instrumentation
An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

 4%
 6%
 5%
 3%

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 3600 rev/KWh.
 1000 rev/KWh.
 960 rev/KWh.
 3750 rev/KWh.

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MORE MCQ ON Measurement and Instrumentation

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