A potentiometer may be used for_________________?

Related Mcqs:

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

   A. from a source which is not the same as the unknown voltage B. from a battery C. from the same source as the unknown voltage D. any of the above...

2. 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°...

3. 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...

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. An induction wattmeter can be used for_________________?

   A. both D.C. and A.C. B. D.C. only C. A.C. only D. any of the above...

8. Which of the following devices may be used for extending the range of instruments ?

   A. Shunts B. Multipliers C. Current transformers D. Potential transformers E. All of the above...

9. A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?

   A. ammeter B. voltmeter C. flux-meter D. ballistic galvanometer...

10. If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________?

    A. 10° B. 80° C. 120° D. 170°...