Electrical Engineering MCQs

Page No. 64

To measure radio frequency, the suitable frequency meter is_______________?


aWeston frequency meter

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b reed vibrator frequency meter

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c heterodoxy frequency meter

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delectrical resonance frequency meter

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Wattmeter cannot be designed on the principle of_________________?


aelectrostatic instrument

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b thermocouple instrument

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cmoving iron instrument

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d electrodynamic instrument

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Alternating current is measured by_______________?


a induction ammeter

✓


bpermanent magnet type ammeter

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celectrostatic ammeter

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dmoving iron repulsion type voltmeter

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View Answer induction ammeter

Instrument transformers are_______________?


apotential transformers

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bcurrent transformers

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cboth A. and B.

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d power transformers

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View Answer both A. and B.

Damping of the Ballistic galvanometer is made small to_______________?


a get first deflection large

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b make the system oscillatory

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cmake the system critically damped

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dget minimum overshoot

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Standard resistor is made from_________________?


aplatinum

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bmaganin

✓


csilver

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dnichrome

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View Answer maganin

The desirable static characteristics of a measuring system are______________?


aaccuracy and reproducibility

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baccuracy, sensitivity and reproducibility

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cdrift and dead zone

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dstatic error

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A Weston frequency meter is_____________?


amoving coil instrument

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bmoving iron instrument

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cdynamometer instrument

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dnone of the above

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In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?


a0.1 Hz

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b 0.25 Hz

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c0.5 Hz

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d 1.5 Hz

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View Answer 0.5 Hz

In a Schering bridge the potential of the detector above earth potential is______________?


aa few volts only

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b 1 kV

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c5 kV

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d10 kV

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View Answer a few volts only

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