In a D.C. machine short-circuited field coil will result in
all above
reduction of generated voltage for which excitation has to be increased to maintain the voltage
unbalanced magnetic pull producing vibrations
odour of burning insulation
all above
Equalizer rings are required in case armature is
lap wound
delta wound
wave wound
duplex wound
lap wound
A D.C. generator can be considered as
power pump
rotating amplifier
rectifier
prime mover
rotating amplifier
In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called
armature
rotor
stator
field
armature
In a D.C. machine stray loss is the sum of
shunt field copper loss and mechanical loss
armature copper loss and iron loss
total copper loss and mechanical loss
iron loss and mechanical loss
iron loss and mechanical loss
Lap winding is composed of
any odd number of conductors
that even number which is exact multiple of poles + 2
any even number of conductors
that even number which is exact multiple of poles
any even number of conductors
Which of the following components of a D.C generator plays vital role for providing direct current of a D.C. generator ?
Commutator
Equilizer rings
Eye bolt
Dummy coils
Commutator
The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A the terminal voltage will be
580 V
620 V
640 V
600 V
580 V
In a D.C. generator the critical resistance refers to the resistance of
load
field
brushes
armature
field
In D.C. generators lap winding is used for
low voltage high current
high voltage high current
high voltage low current
low voltage low current
low voltage high current
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
0 Comments