A. just ahead of magnetic neutral axis
B. in magnetic neutral axis
C. just behind the magnetic neutral axis
D. none
Correct Answer: just ahead of magnetic neutral axis ✔
Last Updated: September 29, 2021
Related MCQs
- A series generator can self-excite:__________?
- A D.C. generator works on the principle of__________?
- The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage__________?
- The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be__________?
- A shunt generator can self-excite:__________?
- With a D.C. generator which of the following regulation is preferred ?
- Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be__________?
- The essential condition for parallel operation of two D.C. generators is that they have __________?
- When two D.C. generators are running in parallel an equilizer bar is used__________?
- Two generators are running in parallel. One of the generators may run as motor for which of the following reasons ?
- Which of the following generators will be preferred if they are required to be run in parallel?
- Which of the following generating machine will offer constant voltage on all loads?
- If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to__________?
- The main factor which leads to unstable parallel operation of flat and over compounded generators is__________?
- When two D.C. series generators are running in parallel, an equilizer bar is used__________?
- Shunt generators are most suited for stable parallel operation because of their__________?
- As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately__________?
- The critical resistance of the D.C. generator is the resistance of__________?
- The series field of a short-shunt D.C. generator is excited by__________?
- In a separately excited generator supplying rated load the armature reaction.
- For both lap and wave windings, there are as many commutator bars as the number of__________?
- Wave winding is composed of__________?
- The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is__________?
- In a D.C. generator:__________?
- In a D.C. generator the critical resistance can be increased by__________?
- Which generator would you prefer for feeding long D.C. transmission lines ?
- Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.
- Armature reaction in a generator results in__________?
- If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be__________?
- The purpose of providing dummy coils in a generator is__________?
- A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be__________?
- A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly__________?
- A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will__________?
- The purpose of providing dummy coils in a generator is__________?
- In D.C. generators on no-load, the air gap flux distribution in space is__________?
- The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except:__________?
- In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except__________?
- In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when__________?
- In a level compounded D.C. generator, full load terminal voltage is__________?
- The e.m.f. generated in a D.C. generator is directly proportional to__________?
- In D.C. generators the polarity of the interpoles__________?
- In over compounded generator, full load terminal voltage is__________?
- Permeance is the reciprocal of__________?
- Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?
- Which of the following generator will have negligible terminal voltage while running on no-load?
- In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when__________?
- D.C. generator generally preferred for charging automobile batteries is__________?
- In case of a flat compounded generator:
- Interpole flux should be sufficient to__________?
- Following D.C. generator will be in a position to build up without any residual magnetism in the poles__________?
- An exciter for a turbo generator is a__________?