how tubelight circuit is connected and how it works?
- 7 Answers
- 52786 Views
- Punj Lloyd Ltd, I also Faced
- E-Mail Answers
Answer Posted / mohit sharma
A fluorescent light does not have the usual glowing
filament of an incandescent bulb, but instead contains a
mercury vapor that gives off ultraviolet light when
ionized. The ultraviolet light makes particles that coat
the inside of the tube, and these particles glow or
fluoresce (see How Fluorescent Lamps Work for details).
Fluorescent starters are used in several types of
fluorescent lights. The starter is there to help the lamp
light. When voltage is applied to the fluorescent lamp,
here's what happens:
The starter (which is simply a timed switch) allows current
to flow through the filaments at the ends of the tube.
The current causes the starter's contacts to heat up and
open, thus interrupting the flow of current. The tube
lights.
Since the lighted fluorescent tube has a low resistance,
the ballast now serves as a current limiter.
When you turn on a fluorescent tube, the starter is a
closed switch. The filaments at the ends of the tube are
heated by electricity, and they create a cloud of electrons
inside the tube. The fluorescent starter is a time-delay
switch that opens after a second or two. When it opens, the
voltage across the tube allows a stream of electrons to
flow across the tube and ionize the mercury vapor.
Without the starter, a steady stream of electrons is never
created between the two filaments, and the lamp flickers.
Without the ballast, the arc is a short circuit between the
filaments, and this short circuit contains a lot of
current. The current either vaporizes the filaments or
causes the bulb to explode.
| Is This Answer Correct ? | 42 Yes | 10 No |
Post New Answer View All Answers
Differentiate between ideal and non-ideal voltage sources?
what is ATS & RING MAIN UNIT in Distribution System?And its Function.
why star point of HT motor not earthed?
List the characteristics of filter?
how to decide choke rating for drive?
Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method
what is the maximum temperature rating of a thhn insulated conductor?
What mean by MLTP
What is different between Difnit time and instatous over current relay
How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........
why is using sensor?what is differece between photoelectric and proxmitty?
how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours
how to build a network which step down 415v to 1v rms
What is the difference between AC and DC injection methods for rotor earth fault protection
What is the function of under voltage release ?
