Physics: Electricity and Magnetism: UPSC Previous Year Questions (Science and Technology)
1 previous year UPSC Prelims question on Physics: Electricity and Magnetism (Science and Technology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–1 of 1 question
UPSC 2000Science and Technology · Physics: Electricity and Magnetism
Q1. Fluorescent tubes are fitted with a choke. The choke coil:
Explanation
A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapour. The excited mercury atoms produce shortwave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. The choke coil reduces current in the circuit. A choke coil, also known as an inductor, is used in fluorescent tubes to limit the current flowing through the circuit. It provides impedance to the alternating current (AC) which helps in stabilizing the current and preventing it from reaching excessively high levels. The choke coil does not step up or step down the voltage (these functions are typically performed by a transformer).
Answer key for these questions
Q
UPSC year
Correct answer
1
2000
(c) reduces current in the circuit
Frequently asked questions
How many previous year UPSC questions are there on Physics: Electricity and Magnetism?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Physics: Electricity and Magnetism (Science and Technology), asked from 1996 to 2006. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Physics: Electricity and Magnetism?
Questions on Physics: Electricity and Magnetism (Science and Technology) are available for 6 years, from 1996 to 2006. Use the Year filter to practise a single paper.
