To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken_______________?

Related Mcqs:

1. In an AC. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?

   A. out of phase by 90° B. out of phase by 60° C. out of phase by 30° D. out of phase by 0° E. out of phase by 180°...

2. To measure a resistance with the help of a potentiometer it is_________________?

   A. necessary to standardise the potentiometer B. not necessary to standardise the potentiometer C. necessary to use a volt ratio box in conjunction with the potentiometer D. none of the above...

3. A potentiometer may be used for_________________?

   A. measurement of resistance B. measurement of current C. calibration of ammeter D. calibration of voltmeter E. all of the above...

4. In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?

   A. as long as possible B. as short as possible C. neither too small not too large D. very thick...

5. Basically a potentiometer is a device for________________?

   A. comparing two voltages B. measuring a current C. comparing two currents D. measuring a voltage E. none of the above...

6. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a _________________?

   A. single-phase winding B. two-phase winding C. three-phase winding D. any of the above...

7. The desirable static characteristics of a measuring system are______________?

   A. accuracy and reproducibility B. accuracy, sensitivity and reproducibility C. drift and dead zone D. static error...

8. __________ instruments are those which measure the total quantity of electricity delivered in a particular time ?

   A. Absolute B. Indicating C. Recording D. Integrating...

9. Induction type single phase energy meters measure electric energy in_______________?

   A. kW B. Wh C. kWh D. VAR E. None of the above...

10. It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?

    A. D.C. voltmeter B. Ammeter and a known resistance C. D.C. potentiometer D. None of the above...