Answer / nandagopan

This is found in telecom area.most of the phone wires are
copper.its almost exposed to atmosphere,sand and corrode
producing copper oxide this is why copper act as positively
charged ion to act with negatively charged oxygen.so a wire
with a positively charged accelerates corrosion.to slow down
the positive is grounded to give a negative charge.

to transmit 30kw of power at 30 km what is voltage required

2 Answers   Anglo Eastern, Merchant Navy, NPCIL,

---

What are the difference between these terms ? e.m.f, voltage, potential, potential difference, current etc? what are the difference between these terms ? (electromotive force) e.m.f, voltage, potential, potential difference, reference potential, reference potential difference, current. How can i explain and describe these all terms in single line each and little more explaination too thanks

2 Answers   Siemens,

---

why capacotors burnt out

2 Answers   GMR,

---

What is meant by pilot exciter and its working?

2 Answers  

---

What is tranformer differtial?

0 Answers  

---

why we decide alternating wave form in ac system and not in dc system

2 Answers   GMR,

---

What is the difference b/w RMU & substation

1 Answers  

---

Explain how you intend to work under pressure to meet up with deadline target?

0 Answers  

---

what is load balancing. what maximum load diffence is allowed between phases.

1 Answers  

---

What is converter transformer? Diff b/w converter transformer and distribution transformer? why we use converter transformer in place of giving supply to drives?

1 Answers  

---

Please tell me the power flow from pmg to main rotor of an alternator (Including AVR unit)?

0 Answers   Hindalco,

---

Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.

0 Answers  

---