A. measurement of resistance
B. measurement of current
C. calibration of ammeter
D. calibration of voltmeter
E. all of the above
Related Mcqs:
- 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 - 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° - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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°
