A. moving coil instrument
B. moving iron instrument
C. dynamometer instrument
D. none of the above
0
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?
0
In a Schering bridge the potential of the detector above earth potential is______________?
A. 0.1 Hz
B. 0.25 Hz
C. 0.5 Hz
D. 1.5 Hz
0
If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________?
A. a few volts only
B. 1 kV
C. 5 kV
D. 10 kV
0
If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________?
A. the bridge can always be balanced
B. the bridge cannot be balanced
C. the bridge can be balanced if the resistances have some specific values
0
The two pressure coils of a single phase power factor meter have_________________?
A. 10°
B. 80°
C. 120°
D. 170°
0
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________?
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
0
The power factor of a single phase load can be calculated if the instruments available are_____________?
A. 0.1 Hz
B. 0.25 Hz
C. 0.5 Hz
D. 1.5 Hz
0
A Weston synchronoscope is a________________?
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
0
In a Weston synchronoscope, the fixed coils are connected across_______________?
A. moving coil instrument
B. moving iron instrument
C. dynamometer instrument
D. none of the above
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