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°
In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
(A) exactly 0°
(B) approximately 0°
(C) exactly 90°
(D) approximately 90°
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
To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
(A) magnetic screening
(B) Wagner earthing device
(C) wave filters
(D) any of the above
For measurement of mutual inductance we can use________________?
(A) Anderson bridge
(B) Maxwell’s bridge
(C) Heaviside bridge
(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°
(D) out of phase by 180°
For measurement of inductance having high value, we should use______________?
(A) Maxwell’s bridge
(B) Maxwell Wein bridge
(C) Hay’s bridge
(D) Any of the above
A universal RLC bridge uses_________________?
(A) Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance
(B) Maxwell Wein bridge for measurement of inductance and modified De Santy’s bridge for measurement of capacitance
(C) Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance
(D) Any of the above
A Weston frequency meter is_____________?
(A) moving coil instrument
(B) moving iron instrument
(C) dynamometer instrument
(D) none of the above
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