Answer / raul

The hysteresis loss is due to the retentivity. When you
increase the mag. flux intensity in the material, the mag.
flux density also increases. But when you reverse the
polarity of the mag. field intensity, then the flux
reversal would not follow the same path as it has followed
during the increase. And with mag. flux intensity value
equal to zero, the mag. flux density is not equal to zero
i.e. it has some retentivity. And due to the flow of this
retention field in the material, the hysteresis losses
occur.

Hysteresis loss = hysteresis constant * frequency * (mag.
flux density)^x

where x = Steinmetz constant = 1.5 to 2.5 for ferromagnetic
materials.
and mag. flux density is nothing but retention field.

Answer / s.ramamoorthy

reluctance property

A copper wire of length l and diameter d has potential difference V applied at its two ends. The drift velocity is vd. If the diameter of wire is made d/3, then drift velocity becomes

1 Answers  

---

what happens when current(ac or dc)flowing through a boucket of water?please describe it.

3 Answers  

---

i have need all detail above basic transformer question..

0 Answers  

---

why we did not get shock by touching nuetral of any single phase supply of a electrical equipement?

6 Answers  

---

why PT transformer primary r the grounded?

2 Answers   L&T,

---

Why colled 440V to 3-phase supply.

0 Answers  

---

What magnetic circuit is formed in berry-type constructions and why?

0 Answers  

---

Sir 33kva 2 transformer load 900 amp calc 1800 amp mana jayega

0 Answers   Classic Infotech,

---

what is the reason of power development in synchronous generator due to saliency ?

1 Answers  

---

which relay is used for both detection & correction?(there is only one relay)

2 Answers  

---

How the oil level of the Buchholz Relay come down.

3 Answers  

---

what is b checks and m checks in diesel generator maintenance?

1 Answers  

---