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°
A. 0°
B. 60°
C. 90°
D. 120°
A. parallel
B. perpendicular
C. inclined at 60°
D. inclined at 120°
A. exactly 0°
B. approximately 0°
C. exactly 90°
D. approximately 90°
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
A power factor meter has________________? Read More »
Measurement and Instrumentation A. magnetic screening
B. Wagner earthing device
C. wave filters
D. any of the above
To avoid the effect of stray magnetic field in A.C. bridges we can use_______________? Read More »
Measurement and Instrumentation A. Anderson bridge
B. Maxwell’s bridge
C. Heaviside bridge
D. Any of the above
For measurement of mutual inductance we can use________________? Read More »
Measurement and Instrumentation 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°
A. electrostatic coupling
B. electromagnetic coupling
C. both A. and B.
D. none of the above
Wagner earthing device is used to eliminate errors due to________________? Read More »
Measurement and Instrumentation A. Maxwell’s bridge
B. Maxwell Wein bridge
C. Hay’s bridge
D. Any of the above
For measurement of inductance having high value, we should use______________? Read More »
Measurement and Instrumentation 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 universal RLC bridge uses_________________? Read More »
Measurement and Instrumentation