Answer Posted / koppu chowdaiah

Transformer is working based on the electromagnetic induction. It is static device.If we apply dc voltage to the transformer the relative motion b/w the core & flux is zero.Hence no emf will be induced.And at the same time the reactance of the tr is zero.so it acts as short circuit hence high current will flow. hence the transformer primary wdg is burnt.but the secondary wdg is safe.

hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?

1836

---

a governer in an Ic engine controls the

1126

---

What is a signal flow graph?

1017

---

i want to model paper for section engg.

1959

---

How phase to phase voltage comes 440V.

2012

---

If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

1375

---

Mention how NPN and PNP transistor works?

1223

---

if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current

1626

---

How To increase Knowledge Of boliler regarding To Only Electrical Field..

1562

---

Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

2322

---

please send me jindal previous aptitude and technical question and answer.my email id is deep_raj@live.com

1921

---

What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?

3481

---

Difference between a pilot wire and a normal conductor?

1992

---

What does the kvar means?

1131

---

what is positive , negative & zero equivalent system resistance

1885

---