In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?

Related Mcqs:

1. The two pressure coils of a single phase power factor meter have_________________?

   A. the same dimensions and the same number of turns
   B. the same dimension but different number of turns
   C. the same number of turns but different dimensions
   D. none of the above

2. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?

   A. 0°
   B. 60°
   C. 90°
   D. 120°

3. The power factor of a single phase load can be calculated if the instruments available are_____________?

   A. one voltmeter and one ammeter
   B. one voltmeter, one ammeter and one wattmeter
   C. one voltmeter, one ammeter and one energy meter
   D. any of the above

4. In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?

   A. parallel
   B. perpendicular
   C. inclined at 60°
   D. inclined at 120°

5. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?

   A. unity
   B. 0.8 lagging
   C. 0.8 leading
   D. zero

6. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?

   A. unity
   B. 0.5
   C. 0.3
   D. zero

7. 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°

8. A power factor meter has________________?

   A. one current circuit and two pressure circuits
   B. one current circuit and one pressure circuit
   C. two current circuits and one pres¬sure circuit
   D. none of the above

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

   A. 0.1 Hz
   B. 0.25 Hz
   C. 0.5 Hz
   D. 1.5 Hz

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

    A. 0.1 Hz
    B. 0.25 Hz
    C. 0.5 Hz
    D. 1.5 Hz