Answer / tariq

With the brushes in the G.N.A. position, there is only
cross-magnetizing effect of armature reaction. However, when
the brushes are shifted from the G.N.A. position, the
armature reaction will have both demagnetizing and cross
magnetizing effects.To neutralized the de-magnetizing
effects we add the more ampere-turns in the main windings
and foe cross magnetising effects we use compensating windings.
The second part is how it is related to electrical system?
These effects disturb our main magnetic field and ultimately
the fundamental behaviour of our DC machine. If the DC
machines are the part of electrical system then the positive
or negative effects influenced on these machine will also be
the part of electrical system, less or more.
At the extent of armature reaction only these two are else
nothing as per my knowledge.
For more details please see the following link.
http://www.circuitmaniac.com/2009/05/10/demagnetizing-and-cross-magnetizing-conductors/

How to calculate unit consumption on the basis of load. kWH=kwXhrs.is it correct? kw is motor load.What is unit consumption at 100% load, 50% load & on no load.

6 Answers   GIL,

---

please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.

0 Answers  

---

Hi Everyone ! My Name is Hakim ullah khan please i need formula of Cable Rating because i want to calculate by self without check any Table Chart... Thank you.....

0 Answers  

---

What is corona ? Mention its positve effects .

1 Answers  

---

What is the numerical quantity of sqcm?

0 Answers  

---

what is the purpose of supervision relay coil

1 Answers  

---

FLP zone Types and Details

1 Answers  

---

Why in earthing, the earthing plate is put in vertical position? and further what is soft coke that is used in earthing?

3 Answers   Wipro,

---

What is a LBB protection and why it is used?

2 Answers   Gridco,

---

What will happen when more than one star neutral points at same voltage level are connected to earth by metallic conductor?

1 Answers   TCS,

---

why ac supply neutral should earth not in dc (-)

2 Answers  

---

can we use HPSV LAMP in HPMV LAMP fixture ?and viseversa.

5 Answers   OPS,

---