41
Commonly used standard capacitor is
Answer: concentric cylindrical type
Questions
42
A multirangq instrument has
Answer: multiple shunt or series resistances inside the meter
43
An instrument transformer is used to extend the range of
Answer: induction instrument
44
The power of a n-phase circuit can be measured by using a minimum of
Answer: (n - 1) wattmeter elements
45
The principle on which vector voltmeter is based is
Answer: that it measures the amplitude of a single at two points and at the same time measures their phase difference
46
To avoid the effect of stray magnetic field in A.C. bridges we can use
Answer: magnetic screening
47
In a single phase power factor meter the phase difference between the currents in the two pressure coils is
Answer: exactly 90°
48
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of
Answer: 0.5 Hz
50
The desirable static characteristics of a measuring system are
Answer: accuracy, sensitivity and reproducibility
51
Operating torques in analogue instruments are
Answer: deflecting, control and damping
54
Wattmeter cannot be designed on the principle of
Answer: moving iron instrument
55
Various adjustments in an energy meter include
Answer: Mandalams, Nadu, Kurram & Valanadu
56
To measure radio frequency, the suitable frequency meter is
Answer: heterodoxy frequency meter
57
Which of the following is measured by using a vector voltmeter ?
Answer: All of the above
59
Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
Answer: eliminate creeping at no load
