Answer / saurabh

Nichrome has high resistivity than tungstan,bt tungstan has high melting point than nichrome...that's why tungstan is used as filament of incandescent lamp.

Answer / nagesh.patwari

Pure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals.Because of these properties it is the most commonly used material for light bulb filaments. It can reach high temperature before melting and therefore emit a brighter light than nichrome can. Nichrome on the other hand, although it has a pretty high melting point (1673 K) it is not as high as tungsten, but it is often used for heating devices, such as a blowdryer. An electric current can heat the filament around 2000-3300 K, which stays below the melting point of tungsten but above that of nichrome.

In an ammeter used for measurement of current, what is the meaning of the representation of range as '0-50-300'?

4 Answers  

---

why the transformer primary and secondary windins vector groups vary? why it is something like Dy11 and not as Dy or Yy...

2 Answers  

---

what are the method of testing of transformer??

2 Answers   NCC,

---

what happens if DC earthing and AC earthings are shorted?

1 Answers  

---

How to select the ratio of neutral ct? Is there any relation in between percentage impedance and neutral ct ratio ?

1 Answers  

---

what does hapen if suddently frequency doubled

1 Answers  

---

Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

0 Answers  

---

Difference Between Isolator and Mcb

13 Answers   VHB Medi Life Sciences,

---

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, but why any one or both Ngr in line? Ngr is use for which purpose?

3 Answers  

---

how to calculate percentage impedence at 75 deg C at normal tap

0 Answers  

---

what is the difference b/w KVA and KW? the transformer are mentioned KVA rating and the loads are mentioned KW.why?

2 Answers  

---

why master trip(86) used in eletromagnet?

1 Answers  

---