Acme Ai
A
अ
GS Paper IUPSC Prelims 2000
Health & Medicine
Question No. 288Interactive Test Mode
00:00
+2-0.66

Q288. For reproducing sound, a CD (Compact Disc) audio player uses a:

For reproducing sound, a CD (Compact Disc) audio player uses a:

Select the correct option below (or cross out options to eliminate)
PrevNext Question

Official Answer Key & Detailed Solution

3D PYQ Realm

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2000 • Science and Technology

Correct Answer: Option (C) — laser beam

Concept & Option Breakdown

Standard Reference Verified

A CD audio player uses a semiconductor diode laser beam (optical pickup) to read binary pits and lands stamped on the reflective polycarbonate disc.

Reviewed by Avinash Sir & Acme AI Research Team

Practice Full-Length & Sectional Prelims Mocks on this Interface

50 simulated tests in the APT Prelims Test Series (₹1,493) or 1-on-1 Mentorship with Avinash Sir.

1-on-1 MentorshipOpen Test Platform

Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2000 (Q288)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — laser beam

More PYQs from Science and Technology (Health & Medicine)

Master the Science and Technology syllabus cluster by practicing these related previous year questions.

View All Science and Technology PYQs
2007 • Q284Health & Medicine

Which of the following types is used by computed tomography employed for visualisation of the internal structure of the human body?

Science and TechnologyPractice
2006 • Q285Health & Medicine

What does the term Dolby B or Dolby C printed on tape- recorders and other sound systems refer to:

Science and TechnologyPractice
2005 • Q286Health & Medicine

Consider the following statements: 1. A geo-stationary satellite is at an approximate height of 10,000 km. 2. FM transmission of music is of very good

Science and TechnologyPractice
2001 • Q287Health & Medicine

Consider the following statements: In a nuclear reactor, self-sustained chain reaction is possible, because: 1. more neutrons are released in each of

Science and TechnologyPractice
2000 • Q289Health & Medicine

Which one of the following does a TV remote control unit use to operate a TV set?

Science and TechnologyPractice
1998 • Q290Health & Medicine

One astronomical unit is the average distance between:

Science and TechnologyPractice
2024 • Q1Biotechnology & Genetics

"Membrane Bioreactors" are often discussed in the context of:

Science and TechnologyPractice
2024 • Q2Biotechnology & Genetics

Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?

Science and TechnologyPractice

Frequently Asked Questions — UPSC Prelims 2000 Q288

What is the official answer for UPSC Prelims 2000 GS Paper I Question 288 (Science and Technology)?

The official UPSC answer key for this 2000 Science and Technology (Health & Medicine) question is Option (C): "laser beam". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2000 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

To solve Health & Medicine questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

Beyond Previous Year Questions

Structured Prelims Practice & Mentorship

Pair previous year question analysis with full-length simulated mock tests and 1-on-1 faculty guidance.

APT 2027 • 50 Prelims Tests17% OFF

Acme Prelims Test Series (APT)

Built to eliminate 1/3rd negative marking losses and 50–50 option traps through structured simulation and NCERT-backed keys.

  • 50 High-Yield Tests: Subject Sectionals, Current Affairs, CSAT Paper II & Full-Length Simulators
  • 1/3rd Penalty & Trap Analytics: Identify whether marks are lost to over-attempting or conceptual gaps
  • Option-by-Option NCERT Keys: Detailed distractor analysis and elimination logic for every question
  • Custom PDF-to-Mock Generator: Convert your revision notes or current affairs PDFs into practice tests
Complete 50-Test Package
₹1,493₹1,799• Valid till Prelims 2027
Explore APT Test SeriesTry Free Mock
1-on-1 Personal MentorshipCapped at 10 Seats

1-on-1 UPSC Mentorship with Avinash Sir

Weekly 1-on-1 strategy reviews, daily study accountability, and personalized MCQ attempt audits with an experienced UPSC mentor.

  • Weekly 1-on-1 Sessions: Direct mentorship with Avinash Sir (Former Plutus IAS Mentor, UPSC & UPPCS Mains Written)
  • APT 50-Test Series Included: Full Prelims GS1 & CSAT test series bundled at no additional cost
  • Mock Attempt & Elimination Audit: Question-by-question review to calibrate your risk and attempt accuracy
  • Prelims & Integrated Tracks: Available as dedicated Prelims mentorship or end-to-end Prelims + Mains guidance
Prelims & Integrated Tracks
17% OFF• Includes APT 50-Test Series
Explore 1-on-1 MentorshipCompare Tracks
Previous QuestionIn an open economy, the national income (Y) of the economy is: (C, I, G, X, M stands for Consumption, Investment, Govt. Expenditure, total exports and total imports respectively.
Next QuestionWhich one of the following ports of India handles the highest tonnage of import cargo?