Answer Posted / onkar singh

i think a synchronous motor is based on the same principle
as separetely excited dc motor,the only difference is that
its rotor or magnetic field rotates by the speed of 120f/p
with the help of a pony motor. in influence of the magnetic
field of rotor, stator or shaft rotates or comes in
working.also an asynchronous motor is nothing but an
induction generator but working in negative slip region.

when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

1676

---

what is the acceptable limit value for Desolve Gas Analysis/

1936

---

what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?

2318

---

How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?

3024

---

what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

2312

---

What is the source of dependent source ?

1843

---

How to decide and select the different earthing wire size for the different types of earthing

2233

---

Refernce currents are to be generated using refernce cueernts how can this be done??

1970

---

Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0

3631

---

Define coil span?

1028

---

aternator every parts and its working

1594

---

The electrical energy required to raise the tempreture of a given amount water is 200 kwh. If the heat losses are 20%, the energy required is?

1967

---

how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical

2537

---

what is the minimum requirement gigaohms for the insulation test using 5kv in 300mm xlpe cable

1945

---

why you don not show protection and type of isolation in key single line diagram?

1942

---