Answer / rajeshsan

The Filament in lamp is located in either side of the Tube. And The tube is filled gas. The choke will be connected in series and one end of both the filament will connected to the starter. The starter is made up of Bi-metallic filament.

The 230V AC supply will not enough for electrons to flow inside the Florescent lamp.

Hence once power is switched ON. The current flows in the starter and starter will begin to flickering which will leads the choke to induce more voltage say 1000V Appox.

Answer / thowsif_emerson

A fluorescent lamp or fluorescent tube is a gas-discharge
lamp that uses electricity to excite mercury vapor. The
excited mercury atoms produce short-wave ultraviolet light
that then causes a phosphor to fluoresce, producing visible
light.

Log on to http://en.wikipedia.org/wiki/Fluorescent_lamp

Answer / baskaran.r

the answer given in 1 is ok. the starter is used to light
the filament to heat up The starter will conduct only with
220v once the lamp comes up the choke drops the voltage to
aprox.to120v and this voltage is will not make starter to
conduct

what is the formula for hv test for cable and circuit breaker..????

0 Answers  

---

How i measured Bus bars weight without wighting ?

3 Answers   Encom,

---

Name different types of circuit breakers and their voltage ratings?

11 Answers   NTPC,

---

One of the advantages of HRC fuse links is that they can be used to back up equipment with an inadequate rupture rating. briefly discuss what this means

1 Answers  

---

when we given 3 phase supply to ups system, but out put comes with 3 phase + neutral how it possible? pls explain.

3 Answers   Enzen, Juniper Networks,

---

what dose the arrow indicate in the symbol of power transformer?

1 Answers  

---

What are the safety measures of Alternator Explain them?

1 Answers   HSL,

---

my question is Megger of cable insulation or swgr board meggerring some values in one day 50mohms,some other day checking different values(20Mohms). this tell that some person tell that that values ok. how to identify the megger value is correct. pls tell me the answer.

2 Answers  

---

Whether power factor should be high or low? Why?

0 Answers  

---

What happened when the field winding of dc series motor is open?

2 Answers   Bhel,

---

what is the workimg of ct &pt?

5 Answers  

---

what can i do, if i want to carrier in design as i am electrical engg?

3 Answers  

---