Answer / mubeen saifi

White colour LED is possible. By combining blue,green and
red colour LEDs in one shell. And by maintaining an optimum
temperature because temperature is responsible for colours
on Kelvin scale.

why we use 50hz frequency in india why not other frequencies like 52,59,42 etc

5 Answers   INTC,

---

Why no-load primary current is very small as compared to full load current in transformer (as 1% of full load current?

5 Answers   NTPC,

---

What is the formula to calculate the rating of a three phase miniature circuit breaker

0 Answers  

---

What the methode get earth resistance?

2 Answers  

---

How to measure 20 hp motor resitance

1 Answers  

---

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

---

why so maney smaller size capacitor use instead of single Big size capacitor in apfc panel

1 Answers  

---

Is RTCC panel needs any control supply.

0 Answers   HPCL, Schneider,

---

how to calculate ups and battery rating

2 Answers  

---

Define reserve-generating capacity?

0 Answers  

---

we all know that in transformer, voltage and current are inversely related i.e. Vp/Vs= Is/Ip....so in standard CT..we have a ratio of 200/5...that means our voltage should increase by ratio of 40..althoug that is not the case...because that requires high insulation level.and pratically not feasible......can anybody clarify my ques.......thanx

2 Answers  

---

What is an Air COmpressor

0 Answers   DLF,

---