Fluorescent lighting (tube light): What is the primary purpose of the choke (ballast) in a fluorescent lamp circuit? Consider both starting and steady-state operation. Choose the best description.
Interview
Technology
Difficulty: Easy
Choose an option
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ATo limit lamp current (ballast) and aid starting
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BTo increase tube brightness by heating the phosphor
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CTo convert AC to DC for the lamp
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DTo filter radio interference exclusively
Answer
Correct Answer: To limit lamp current (ballast) and aid starting
Explanation
ConceptThe choke/ballast limits current through the discharge tube (negative resistance device) and, with the starter, provides a high-voltage kick to initiate the arc.
Final AnswerTo limit lamp current (ballast) and aid starting