Physics: Electricity and Magnetism: UPSC Previous Year Questions (Science and Technology)
2 previous year UPSC Prelims questions 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 1–2 of 2 questions
UPSC 1996Science and Technology · Physics: Electricity and Magnetism
Q1. Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?
Explanation
Assertion (A) is true: A transformer is designed to change the voltage level of an alternating current (AC) by using electromagnetic induction, either increasing (stepping up) or decreasing (stepping down) the voltage. Reason (R) is false: A transformer only works with alternating current (AC) because it relies on the changing magnetic field created by the alternating current to induce voltage in the secondary coil. It does not function with direct current (DC).
UPSC 1996Science and Technology · Physics: Electricity and Magnetism
Q2. Domestic electrical wiring is basically a:
Explanation
Domestic electrical wiring is primarily a parallel connection, meaning that appliances and devices are connected in parallel to the power supply. This ensures that each device receives the same voltage, and turning one device on or off does not affect the others. Parallel wiring also allows for individual control of appliances and prevents overloading of a single circuit. In a series connection, devices share the same current, and the total resistance adds up, which can cause voltage drops, as seen in old-fashioned Christmas lights where if one bulb fails, the entire string goes out.
Answer key for these questions
Q
UPSC year
Correct answer
1
1996
(c) A is true but R is false
2
1996
(b) parallel connection
Frequently asked questions
How many previous year UPSC questions are there on Physics: Electricity and Magnetism?
This page covers 2 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.
