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GS Paper IUPSC Prelims 2010
Health & Medicine
Question No. 86Interactive Test Mode
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Q86. Consider the following: 1. Bluetooth device 2. Cordless phone 3. Microwave oven 4. Wi-Fi device Which of the above can operate between 2.4 and 2.5 GHz range of radio frequency band?

Consider the following:

  1. Bluetooth device
  2. Cordless phone
  3. Microwave oven
  4. Wi-Fi device Which of the above can operate between 2.4 and 2.5 GHz range of radio frequency band?
Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2010 • Science and Technology

Correct Answer: Option (D) — 1, 2, 3 and 4

Concept & Option Breakdown

Standard Reference Verified

The 2.4 GHz to 2.5 GHz frequency range is an internationally designated Industrial, Scientific, and Medical (ISM) radio band open for unlicensed use.

  1. Bluetooth devices operate in the 2.402–2.480 GHz range.
  2. Many digital cordless phones operate in the 2.4 GHz band.
  3. Microwave ovens use electromagnetic radiation at approximately 2.45 GHz to heat water molecules in food.
  4. Standard Wi-Fi (802.11 b/g/n/ax) operates extensively in the 2.4 GHz band.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2010 (Q86)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — (d) 1, 2, 3 and 4

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Frequently Asked Questions — UPSC Prelims 2010 Q86

What is the official answer for UPSC Prelims 2010 GS Paper I Question 86 (Science and Technology)?

The official UPSC answer key for this 2010 Science and Technology (Health & Medicine) question is Option (D): "(d) 1, 2, 3 and 4". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2010 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.

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