Asked by: Chahinez Heithsports sailing
What is the purpose of magnetic ballast in fluorescent lamp?
Last Updated: 19th May, 2020
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Also to know is, what is the function of ballast in fluorescent lamp?
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides sufficient voltage to start the lamps. Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw.
Secondly, what is inside a fluorescent ballast? This lamp consists of a glass tube filled with an inert gas (usually argon) at low pressure. On each side of the tube you will find a tungsten electrode. The ballast regulates AC power to the electrodes. Older lamps used a starter to get the lamp going.
Subsequently, one may also ask, how does a magnetic ballast work?
In short, a coiled length of wire in a circuit (an inductor) opposes change in the current flowing through it (see How Inductors Work for details). The transformer elements in a magnetic ballast use this principle to regulate the current in a fluorescent lamp. Magnetic ballasts may also vibrate at a low frequency.
How do you know if a ballast is magnetic or electronic?
Just point your cell phone camera at the lamp, and take a picture. If the image displays dark bands or stripes, your fluorescent lamp is driven by a magnetic ballast. A modern, electronic ballast drives the lamp at a much higher frequency, and a picture of these lamps will be clearly different, without such bands.