A 200 V d.c. shunt motor with armature resistance of 0.2 Ω and carryi – McqOptions

MCQOPTIONS

1.	A 200 V d.c. shunt motor with armature resistance of 0.2 Ω and carrying a current of 50 A is running at 960 r.p.m. If the flux is reduced by 10% at constant torque and with negligible iron and friction losses, the speed will be nearly.
A.	1280 r.p.m.
B.	1170 r.p.m.
C.	1100 r.p.m.
D.	1060 r.p.m.
Answer» E.

Discussion

No Comment Found

Related MCQs

For a dc machine, its commutator has a diameter of 50 c rotating at 1000 rpm. For a brush width of 1 cm, the time commutation taken by the machine will be _________
A dc machine is run at rated speed in forward direction and then in backward direction. It is observed that, speeds of the rotation are different, then it leads to the conclusion of _________
If the students give a forward shift of 10° to the dc generator, then it _________
The post effects of the armature reaction is _________
The effect of fringing increases as we _________
Thyristor controlled starter is preferred over DOL starter due to _________
The shunt motor starters that can be used is/are ___________
Considering a human handed control system for the dc motor speed control, if the resistance wire cut out too slowly, then the _____________
A dc series motor of resistance 1 Ω across terminals runs at 1000 rpm at 250 V taking a current of 20 A. When an additional resistance of 6 Ω is inserted in series and taking the same current, the new speed would be
Identify the important feature of a DC series motor.