Answer / pavan krishna

reactance is nature of either inductor or capacitor but
impedence is mixed effect of the resistor and either
capacitor or inductor

Answer / md. obaydur rahman

The impedance Z of an alternating current circuit is a
complex number given by Eq. (1).
1. Z = R + jX

2. Z = jL\omega = jX

3. Z = -{j\over C\omega } = jX
The imaginary part X is the reactance. The units of
reactance, like those of impedance, are ohms. Reactance may
be positive or negative. For example, the impedance of an
inductor L at frequency ω is given by Eq. (2), so X is
positive. The impedance of a capacitor C is given by Eq.
(3), so X is negative

what is meant by VDC ?where its applicable ?

2 Answers  

---

how to calculate current in HT side when we having LT current

2 Answers  

---

which is the most common harmonics 3rd,5th,7th affect the systegm

4 Answers  

---

We all have seen transmission and Distribution lines In transmission lines the voltage is high and current is low(to reduce I^2r loss) and in distribution lines voltage is low but current is high however the size of transmission wires is bigger than that of distribution wires even though the amount of current carried by the distribution lines is more than that of transmission lines why?

4 Answers  

---

why use celling fan wing is two or three ?

2 Answers  

---

Why shunt Generator is not recommended to start at ON LOAD condition???

3 Answers  

---

What is the significance of %Z in case of transformer?

1 Answers  

---

WHAT IS VFD,FUNCTION, PURPOSE,

2 Answers   RasGas,

---

what power factor should we maintain to get maximum benefits our organisation load is 10 MW? is it best to maintain the PF at .96 rather than Unity to save electricity bill?

1 Answers  

---

how current is reverse from its normal direction during the fault?

0 Answers   HGF,

---

better choice of area of interest to post in our resume?

2 Answers   Cognizant,

---

Dear all i want to know SEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me zohairaukllah@yahoo.com

0 Answers  

---