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What is the function of a capacitor in a fluorescent light fitting?
Wiki User
∙ 13y ago
A capacitor is used to improve the power factor of the lamp.
More details
To prevent the lamp from taking too much current a fluorescent lamp has to have a choke, which has magnetic inductance. The inductance has a negative impact on the power factor of the (the ratio between apparent power and real power taken by the lamp) - i.e. the power factor is reduced - so a capacitor is used to compensate for the inductance by improving the power factor so that it is closer to the ideal value of 1.
Basically the inductor with the capacitor smooths out the voltage or current.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoYour standard everyday capacitor is sealed and is not effected by light. A classic experiment that approximates a capacitor is two plates in a vacuum tube with one connected to + and the other to -. In a steady state no current flows and charge can build up on the plate. A light is then shined on one plate and if sufficient current will flow. This is known as the photo electric effect and was discovered by Einstein and he won the Nobel prize for the discovery.
Wiki User
∙ 12y agoTo improve the power factor of the circuit, which would otherwise be adversely affected by the choke (inductor) used to limit the current flowing through the tube(s). Poor power factor causes the load to draw more current than necessary for a given power.
Wiki User
∙ 12y agoA capacitor is connected across the lamp's choke (inductor) in order to improve the power factor of the lamp. Too low a power factor will result in the lamp drawing more load current than is necessary -'improving' the power factor, raises its value, and reduces the load current.
Wiki User
∙ 11y agoto improve the power factor of the circuit.
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Why capacitor is used in tube light circuit?
For power factor improvement so that the KVA demand is reduced.
What is the fluid in a fluorescent light bulb?
In a fluorescent light bulb there is usually a drop of mercury. That mercury vaporizes as the bulb warms up and it becomes gaseous, enhancing the electron interaction through the bulb, making it brighter.
How many mercury atoms are in one fluorescent light bulb?
in a compact flourescent about 8mg.
Can old or weak fluorescent lights explode if they're not changed?
Old fluorescent light do not explode. It will go only dimmer and dimmer or sometimes flickering and flashing on/off when it is defective.
Can higher voltage burn the fluorescent bulbs?
it all depends on the voltage the light bulb can sustain.
How does a fluorescent light fitting operate?
mercury
Does a fluorescent light fitting with 4 x T8 2' 18W tubes and a 48W ballast use all 120W when running?
No, a fluorescent light fitting with a 4xT8 2' 18W tube and a 48W ballast does not use all the 120W when running.
What is the main function of phosphor in the fluorescent?
the poo gives us light
The lagalities regarding modifying a fluorescent light batten holder for fitting a led light t8 tubeI will be bridging the ballast and removing the starterI am a competent person1?
No. You are not.
How do you remove a non-integrated bi-pin double-turn compact fluorescent lamp?
Pull the light globe straight out of the fitting. No twisting.
Can one replace a tungsten bulb with a compact fluorescent bulb?
Yes, if it fits the socket and the light fitting, or lamp fixture, with its cover or shade. You will not be able to dim the compact fluorescent as you did the incandescent (unless you have a really fancy dimmer).
Why would you have a capacitor in series with a ballast in a fluorescent light?
The purpose is twofold. First it is a transformer which steps up the voltage to an amount that will operate the lamp. Secondly it acts as a resistance for the lamp. Without it the flourescent lamp would keep increasing current flow until it would completely burn itself out.
How is fluorescent different from natural light?
Well.. the difference is that fluorescent light isn't natural and natural light isn't fluorescent . its not rocket science (:
Does a ballast use electricity if no bulbs are present?
If you mean the ballast in a fluorescent light fitting where the ballast is wired in series with the tube, the answer is "No". Explanation: If no tube is in place, the light fitting's circuit is "open" so there is nothing to take any current from the "hot" supply wire and return it to the "neutral" wire.
Is there any electrical hazard when removing a fluorescent tube?
The electrical connections for a fluorescent tube are quite small and also inside the lamp holder at either end of the bulb (2 on each end).Since you won't be able to put your finger into these connections regardless of whether the lamp is in or not, there is no real electrical hazard when removing a fluorescent lamp while it is turned on. However it should be noted that this is only under normal operating conditions and if a fault is present there could be a chance of a hazard from any metal parts of the light fitting (not the tube).If the light fitting is turned off, there will be no voltage in the fitting and hence no electrical hazard anywhere on the fitting (again not accounting for faults). This is how I would recommend changing a tube (this is not always possible where the fitting is the only source of light).It should be noted that fluorescent tubes can heat up during operation and that dust may have settled on top the lamp, so appropriate safety equipment is recommended (gloves and goggles). You will also generally be working at height.Lastly fluorescent tubes are glass so take appropriate care when handling.If in doubt please contact an electrician.
Why does a plasma ball make fluorescent light bulbs light up?
Anything that excites the gas in a fluorescent will make it light. Static electricity from the carpet will cause compact fluorescent to light.
Which state help produce light in fluorescent light bulbs?
Which state helps produce light in fluorescent lightbulbs?
