Answer / k.prakashchandra

High voltage is required to strike the arc inside lamp at
the starting point and once the arc is struck and lamp is
illuminated ,the voltage across the lamp is zero.It is the
ballast which has to control the current and it requires
voltage rating and not the lamp

Answer / arunkumar

So far i know HPSV amd HPMV lamps requries only 210v for
initial ignition. Only the Metal halide lamps require 222V
constantly to glow

what is the function of cooling tubes in transformer

4 Answers  

---

can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

11 Answers   Philips,

---

what is th basic difference between a d latch time line and a d flip flop time line???

0 Answers  

---

The moisture in air will condense at

0 Answers   Caterpillar,

---

What is the main purpose of relay?

1 Answers  

---

---

in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks

0 Answers  

---

What is on line ups and off line ups?

2 Answers  

---

What is dynamo?How it works and what is the function of dynamo in a DG.

0 Answers  

---

why there is a high voltage line in multiplication of 11?i.e.- -66kv,11,kv,22kv

4 Answers   Bhel,

---

If 110V DC Coil Contactor taken 15ma DC on load,than how much AC current wil be taken?

0 Answers   Lafarge, Shree Cement,

---

how can we solve the RMS value of alternative Qnty is .707 , explain detail .

2 Answers  

---

what is meant by class 1 E in electrical power supply?

0 Answers  

---