Answer / bhadrappahr

Fluorescent tube is a gas discharge lamp. It consists of two
filamentary thermionic electrodes mounted at each end of
glass tube. The tube is filled with an inert gas like
mercury at low pressure and sealed. A high voltage is
necessary to start conduction through the tube. To obtain
this high voltage during starting an iron cored choke and
glow type starter are connected in series with filaments.
When the supply is switched ON an arc is struck between the
starter electrodes which causes a current to flow through
the choke and filaments. The filaments get heated up and
emit electrons. After a few seconds the starter electrodes
separates and due to this separation current is interrupted.
This interruption causes high voltage to be induced in the
choke which appears across the filaments of the tube
resulting in discharge through the tube. The gas inside the
tube is ionized and the ionized gas emits ultra-violet
radiation which is absorbed by the fluorescent material
coated inside of the tube this in turn emits light
radiations causing the tube to glow.

Answer / purusothaman.t

tube light starter:only for startung current limit purpose

A 230V, 60W bulb when connected to 230v supply what current and power will consume, if same bulb is connected to 200v what purrent and power will consume?

3 Answers  

---

if two transformers are parallel & both have fault short ckt. impedance of 50KA in each case will it increase or decrease show example?

1 Answers  

---

AVR is used for the Voltage regulation of the Generator using the feedback signal by exciting the field winding of the generator.But how the field winding will be excited & using what?

2 Answers   Alstom,

---

What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

0 Answers  

---

what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?

0 Answers  

---

Explain the operation of variable frequency transformer?

0 Answers  

---

How to calculate the voltage drop of 4 Core 50 Sqmm SWA cable for a distance of 350 mtrs and what can be the maximum load connected to it?

3 Answers  

---

What is the minimum value required for Neutral to Earth in UPS Panels

3 Answers  

---

Why is negative feedback invariably preferred in closed loop system?

0 Answers  

---

How to calculate or testing the KW in generator

1 Answers  

---

what is meant by skew width in machines?

0 Answers  

---

what is meant by LT & HT?

5 Answers   ABB,

---