Answer / vigneshwaran

while starting d.c series there is no back e.m.f produced in
it and also it has high torque

Answer / pradyumna chdndra panda

Flux produced in field of DC series motor is less and armature current is slightd reduced at starting time because very low value of resistance is used in dc series stator and by study these relation and effects, we sure that there is no back emf produced in dc series motor that is why ....

Answer / deepak24

dear friend note that in dc series motor, speed is proportional to back emf and inversely proportionally to the field flux now,
Eb=V-IaRa, since Ra is very small so Eb is high.
and since field coil have less no. of turns so fild flux is less

hence by considering above two points speed of series motor is high.

What is the full form of AND,OR and other logic gates

7 Answers  

---

IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.

0 Answers  

---

defination of static variable compensator

1 Answers  

---

explain impact of tariff on energy management..? and what is ABT tariff

5 Answers   TCS,

---

i have to use generator in my project,which gen. i can use?

1 Answers  

---

How to calibrate or test an LT Air Circuit breaker 440 volts, 35 KA, 800 Amps ?

0 Answers   ABB,

---

Explain few advantages of electric traction system?

0 Answers  

---

what are all the daily preventive maintainance carried out in transformer?

1 Answers  

---

why we are using KVA rating for transformer,not KWh rating?

5 Answers   NTS,

---

how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

1 Answers  

---

What is bandpass of a transformer?

2 Answers  

---

Why 5kv megger used to megger 6.6kv motor or 33kv transformer why not 500v?

2 Answers  

---