Answer / iamdon

Reactive powers (vars) are required to deliver active power
(watts)through transmission lines. Most of the electric
equipments works on the induction priciple where the
magnetizing current is needed to establish the working flux.The
energy stored in field is returned back to system when it
turned OFF,but as long as it is ON we need Q(it is oscillating
at the frequency which is double of supply frequency). Motor
loads and other loads require reactive power to convert the
flow of electrons into useful work. When there is not enough
reactive power, the voltage sags down which creates a vicious
circle and it is not possible to push the power demanded by
loads through the lines.

Author;arbelectbit@yahoo.com

Answer / sanjeev rangari

power requried to setup in mangentic flux in electrical circuit is called reactive power.

Answer / sajal mittal

reactive power is that power which can oscillates between
the transmission end and user end and it is only in setting
up a magnetic flux around a conductor and it is always
conserve it is no created nor destroyed

why the electric train touches only one conductor n where is the neutral n it will be running 3-phase or 1-phase?

3 Answers  

---

what is the power ratio between power in star and delta circuit?

3 Answers  

---

During speed control of dc shunt motor with flux control methode,when armature voltage is constant, How can it possible to increasing the armature current?

1 Answers  

---

what is neutral grounding? why is it required? what is neutral grounding resistor and how is its value calculated??

11 Answers   NTPC, ONGC,

---

No load test of induction motor is carried out to compute= A stator resistance B rotor resistance C magnetizing reactance D rotor reactance

1 Answers  

---

---

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

0 Answers   SISL,

---

What is lc oscillator?

0 Answers  

---

what is skin effect and corona discharge ?

4 Answers   Asian Paints,

---

A 25MVA 3300/400V T/F is termed as per winding is …… a) primary 3300V & Secondary 400V b) primary 3300V & low voltage winding 400V c) High voltage winding 3300V & Secondary 400V d) High voltage winding 3300V & low voltage winding 400V

4 Answers   Engineers India Limited,

---

i want to measure voltage difference between neutral and earth so i just simply use voltmeter. my question is that may i use this measure continuosly.or there are some electricity board restrication on that? or it creat some problem on my measuring device..?

2 Answers   NEEC,

---

how choose conductor&depending upon load

0 Answers   Ford, HCL,

---

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

1 Answers  

---