|
When the rotor speed, in a synchronous machine, becomes more than ___
|
|
0
|
125
|
November 3, 2021
|
|
Synchronous motors are
|
|
0
|
124
|
November 3, 2021
|
|
The back e.m.f. of a synchronous motor depends ___
|
|
0
|
154
|
November 3, 2021
|
|
Three-phase alternators are invariably star-connected because ___
|
|
0
|
1033
|
August 8, 2021
|
|
Unbalanced 3 phase stator currents cause ___
|
|
0
|
193
|
August 8, 2021
|
|
In an alternator short circuit current is limited by ___
|
|
0
|
438
|
August 8, 2021
|
|
The rotor preffered for low speed hydro-generator is ___
|
|
0
|
171
|
August 8, 2021
|
|
Smooth cylindrical rotors are usually designed for ___
|
|
0
|
491
|
August 8, 2021
|
|
In synchronous machine the stator frame serves the ___
|
|
0
|
224
|
August 8, 2021
|
|
Hydro-Generators are generally employed to run at ___
|
|
0
|
247
|
August 8, 2021
|
|
The maximum current that can be supplied by ___
|
|
0
|
528
|
August 8, 2021
|
|
The seventh space harmonics in the mmf produced by balanced ___
|
|
0
|
748
|
August 8, 2021
|
|
In an alternator, the armature reaction is considered to be equivalent to a fictitious ___
|
|
0
|
315
|
August 7, 2021
|
|
In synchronous generator, the effect of cross magnetization is to ___
|
|
0
|
172
|
August 7, 2021
|
|
Synchronous reactance of an alternator is due to ___
|
|
0
|
186
|
August 7, 2021
|
|
Regulation of an alternator supplying resistive or inductive load is ___
|
|
0
|
474
|
August 7, 2021
|
|
The short circuit characteristic of an alternator is ___
|
|
0
|
215
|
August 7, 2021
|