in case dc we mark as + ve & -ve..but in case a.c. we mark as ph&N...Y LIKE PLZ TELL ME

4 Answers   NPTC, TCS,

---

What is the difference between Earthing & grounding

4 Answers  

---

Why is back emf used for a DC motor? Highlight its significance.

0 Answers   ABB,

---

the winding of Gen and Motor is star or in delta ??? and why

1 Answers  

---

how to calculate lux level in out door (yard lighting) please expalin with a example

1 Answers   IVRCL,

---

in alternator what is use of AVR ? how AVR is operating either AC or DC?

1 Answers  

---

Can we calculate the P.F if we know the only load on alternator .

1 Answers   Medha, Medha Servo,

---

if you are in a software company,then why do you want to come in a core company like sail, ntpc(where lots of trouble like tension but you have a good life in a it company) ?

0 Answers   Sail,

---

Any one Give me formula for to increse the power factor, 0.8 to 0.95, How much the KVAr Required

9 Answers   Emerson, Rajshree Sugars, Siemens,

---

Why Power factor is different - different in all three phase of a 3 phase nduction motor.

2 Answers  

---

WHAT IS MOBILE SUB-STATION? & REALLY BENEFIT IN INDIA

0 Answers   BMC,

---

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?

0 Answers  

---