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Questions and Answers
What is the function of the fluorescent tube in a fluorescent lamp?
What is the function of the fluorescent tube in a fluorescent lamp?
- To produce high voltage to start the lamp
- To limit the flow of current during operation
- To preheat the electrodes
- To contain mercury vapor and inert gas with phosphor coating (correct)
What is the function of the ballast in a fluorescent lamp?
What is the function of the ballast in a fluorescent lamp?
- To limit the flow of current during operation (correct)
- To preheat the electrodes
- To contain mercury vapor and inert gas with phosphor coating
- To produce high voltage to start the lamp
Why is a limiting device like a ballast necessary in a fluorescent lamp?
Why is a limiting device like a ballast necessary in a fluorescent lamp?
- To preheat the electrodes to make available a large supply of electrons
- To provide a surge of relatively large potential to start the arc between the electrodes
- To prevent the arc current from increasing beyond the limit
- To protect the lamp from excessive current that could destroy it (correct)
What percentage of power consumed by a fluorescent lamp is typically used by the ballast?
What percentage of power consumed by a fluorescent lamp is typically used by the ballast?
What does the ballast do to prevent the arc current from increasing beyond a certain limit?
What does the ballast do to prevent the arc current from increasing beyond a certain limit?
What is the function of the ballast in a fluorescent lamp?
What is the function of the ballast in a fluorescent lamp?
What is the primary purpose of the fluorescent tube in a fluorescent lamp?
What is the primary purpose of the fluorescent tube in a fluorescent lamp?
Why is a limiting device like a ballast necessary in a fluorescent lamp?
Why is a limiting device like a ballast necessary in a fluorescent lamp?
What percentage of power consumed by a fluorescent lamp is typically used by the ballast?
What percentage of power consumed by a fluorescent lamp is typically used by the ballast?
What does the ballast do to prevent the arc current from increasing beyond a certain limit?
What does the ballast do to prevent the arc current from increasing beyond a certain limit?
