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UPSC 2000: Fluorescent tubes are fitted with a choke. The choke coils
(a)step up the line voltage
(b)step down the line voltage
(c)reduce current in the circuit
(d)choke low-frequency currents
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Not attemptedCorrect Answer: (c) reduce current in the circuit
The choke in a fluorescent tube is an inductor that limits (reduces) the current after striking; without this current-limiting action the tube would draw excessive current and burn out. It does not step the mains voltage up or down, nor does it selectively block low-frequency currents. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-2000-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 2000 Science & Technology question?▼
The correct answer is option (c): reduce current in the circuit. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2000, GS Paper 1, as Question 100. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.