Answer / saurabh sarkar

odds are there is no field current flowing in field
windings

Answer / vidhy@....

both 2 and 3 are correct........
An armature mean the pole piece of a permanent
magnet or electromagnet, or the moving iron part of a
solenoid or relay. The other component is the field winding
or field magnet. The role of the "field" component is
simply to create a magnetic field (magnetic flux) for the
armature to interact with, so this component can comprise
either permanent magnets, or electromagnets formed by a
conducting coil.
The armature, in contrast, must carry current so it
is always a conductor or a conductive coil, oriented normal
to both the field and to the direction of motion, torque
(rotating machine), or force (linear machine). The
armature's role is two-fold.
The first is to carry current crossing the field,
thus creating shaft torque in a rotating machine or force
in a linear machine. The second role is to generate an
electromotive force (EMF). So the real problem may lie at
the fact that
"THERE IS NO FIELD CURRENT ALONG THE FIELD WINDINGS
WOUNDED OVER THE ARMATURE".......

What is the lockout relay

0 Answers  

---

how to caluclate cable size by Amps

2 Answers  

---

what is main difference between live tank and dead tank current transformer?

2 Answers   Atul,

---

pls tell what are doing the three phase motor star and delta connetion with circuit diagram and control wiring .

0 Answers   Mukand,

---

wat is the criteria we use the diff. relay ?

2 Answers  

---

for a 5hp motor to operate from 100kva generator ,what size of cable required in sqmm.

2 Answers   DSC, Indraprastha Gas Limited IGL, UltraTech,

---

hi i will D.E.E.E.is completed pls send rrb diploma old qustion papaer sent in my e mail. i.d.

0 Answers   IIT,

---

When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

2 Answers  

---

Why we are testing a tan delta test in transformer? which purpose conduting that test? and time priode test?

1 Answers  

---

i have 3500 amp load and select current transformer and perches.how i calculate .please understand

0 Answers  

---

can a synchronous motor be made to rotate in a clockwise direction ?

1 Answers  

---

How can you sized or estimate the ligthning arrester current rating?

0 Answers  

---