Electrical Engineering MCQs

Page No. 64

To measure radio frequency, the suitable frequency meter is_______________?


aWeston frequency meter


b reed vibrator frequency meter


c heterodoxy frequency meter


delectrical resonance frequency meter



Wattmeter cannot be designed on the principle of_________________?


aelectrostatic instrument


b thermocouple instrument


cmoving iron instrument


d electrodynamic instrument



Alternating current is measured by_______________?


a induction ammeter


bpermanent magnet type ammeter


celectrostatic ammeter


dmoving iron repulsion type voltmeter


View Answer induction ammeter

Instrument transformers are_______________?


apotential transformers


bcurrent transformers


cboth A. and B.


d power transformers


View Answer both A. and B.

Damping of the Ballistic galvanometer is made small to_______________?


a get first deflection large


b make the system oscillatory


cmake the system critically damped


dget minimum overshoot



Standard resistor is made from_________________?


aplatinum


bmaganin


csilver


dnichrome


View Answer maganin

The desirable static characteristics of a measuring system are______________?


aaccuracy and reproducibility


baccuracy, sensitivity and reproducibility


cdrift and dead zone


dstatic error



A Weston frequency meter is_____________?


amoving coil instrument


bmoving iron instrument


cdynamometer instrument


dnone of the above



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


a0.1 Hz


b 0.25 Hz


c0.5 Hz


d 1.5 Hz


View Answer 0.5 Hz

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


aa few volts only


b 1 kV


c5 kV


d10 kV


View Answer a few volts only

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