Which of the following motor has the poorest speed regulation ?
Which of the following motor has the poorest speed regulation ?
A. Shunt motor
B. Series motor
C. Differential compound motor
D. Cumulative compound motor
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In the D.C. motor the iron losses occur in____________?
In the D.C. motor the iron losses occur in____________?
A. the field
B. the armature
C. the brushes
D. the commutatorIn a D.C. generator, the iron losses mainly take place in___________/
In a D.C. generator, the iron losses mainly take place in___________/
A. yoke
B. commutator
C. armature conductors
D. armature rotorWhich motor should not be started on no-load ?
Which motor should not be started on no-load ?
A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motorThe armature voltage control of D.C. motor provides____________?
The armature voltage control of D.C. motor provides____________?
A. constant torque drive
B. constant voltage drive
C. constant current drive
D. none of the aboveThe total losses in a well designed D.C. generator of 10 kW will be nearly______________?
The total losses in a well designed D.C. generator of 10 kW will be nearly______________?
A. 100 W
B. 500 W
C. 1000 W
D. 1500 WThe mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?
The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?A. 4.0
B. 2.0
C. 1.0
D. 0.5