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Why choke is used in lamp?
The vapor gets excited and produces ultraviolet radiation which interacts with the phosphor coating on the inner walls of the tube light and the phosphor produces the glow of the light emanating from the tube light. A choke coil is used to produce this high voltage across the tube.
Does LED light have choke?
The Led is a diode and dies not need a choke to start or maintain current, Led makes use of driver for the application, the driver supplies the led with required current and voltage for its proper operation.
What is the function of choke?
In electronics, a choke is an inductor used to block higher-frequency alternating currents while passing direct current (DC) and lower-frequencies alternating current (AC) in an electrical circuit.
Why choke is necessary for tube light in DC circuit?
Choke is an inductor; hence it acts as a pure inductor. Inductor is having the properties of creating high voltage at stating. This high voltage is enough to trigger the tube lights starter.
Why choke is used in sodium Vapour lamp?
Why is a choke required in a tube light and not in a CFL? So in a conventional fluorescent lamp the role of the choke is to initiate the electrical discharge process. Once the discharge is struck it can be sustained through the drop in electrical resistance of the column.
Is a ballast a choke?
A magnetic ballast (also called a choke) contains a coil of copper wire. The magnetic field produced by the wire traps most of the current so only the right amount gets through to the fluorescent light. That amount can fluctuate depending on the thickness and length of the copper wire.
Why do we connect a choke ballast in series with fluorescent lamp?
An inductor, usually a choke, is very common in line-frequency ballasts to provide the proper starting and operating electrical condition to power a fluorescent lamp, neon lamp, or HID lamp. (Because of the use of the inductor, such ballasts are usually called magnetic ballasts.)
What are the chokes used for fluorescent lamps?
The chokes are used for fluorescent lamps. The Led is a diode and dies not need a choke to start or maintain current, Led makes use of driver for the application, the driver supplies the led with required current and voltage for its proper operation. The Rock reveals the key to success for normal people.
Do LED lights have a ‘choke?
Actually, LED lights do have a ‘choke’, maybe its not fair to call them that, these ‘chokes’ are called ‘LED drivers.’ Chokes are required in fluorescent lights and bulbs.
What is the function of starter and choke in fluorescent light?
In an electronic ballast fluorescent light, the action of the starter is not needed any more. The circuit just generates an initially very high voltage to get the gas inside ionized, which lowers the voltage. Then the circuit limits current to the desired value. Originally Answered: What is the importance of starter and choke in fluoresent lamp?
Can a choke insert positive impedance without resistive loss?
A choke can insert positive impedance without a lot of resistive loss. Once the gas in the lamp (including mercury vapor) is ionized, there is a negative slope in the current vs voltage curve. This means that a decreasing voltage results in more current. This is an unstable situation and would result in so much current flow that damage would occur.