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Waves & Sound — PYQ

NEET Physics · Previous Year Question 6 of 20

Question 6

2018 · NEET 2018

In a stationary wave, the distance between a node and adjacent antinode is:

PrevQ 6 / 20Next

Chapter

Waves & Sound

Year & Shift

2018 · NEET 2018

Exam

NEET UG

Why solve NEET Physics PYQs on Waves & Sound?

This previous year question from NEET 2018 tests your understanding of Waves & Sound — one of the most important chapters in NEET Physics. By solving actual past-exam questions, you gain insight into the examiner's approach, learn to manage time under pressure, and identify which concepts get tested most frequently. PYQ analysis reveals that Waves & Sound has been tested in every NEET paper from 2015 to 2025, confirming its status as a must-prepare chapter.

Waves & Sound — Concept Overview

Waves & Sound is one of the most important concepts within Waves & Sound for NEET Physics preparation. The NEET UG exam regularly feature questions from this area, making it essential for every serious aspirant to develop a thorough understanding. The concept connects fundamental principles with real-world applications, which is why examiners favour it for testing analytical thinking.

This practice question tests your conceptual clarity and problem-solving ability on Waves & Sound. Working through questions at various difficulty levels — Easy for building foundations, Medium for strengthening application skills, and Hard for developing competitive-level mastery — is the proven approach recommended by top rankers and expert educators. Studies of NEET toppers consistently show that systematic difficulty progression leads to 20-30% better retention than random practice.

When studying Waves & Sound, pay close attention to the underlying principles, standard derivations, and common pitfalls that examiners love to exploit. The step-by-step solution provided after you attempt this question will help you understand not just the correct answer, but the reasoning and shortcuts that save time under exam conditions. Many NEET questions on Waves & Sound can be solved 40-50% faster using dimensional analysis or elimination techniques.

Understanding the historical context of how Waves & Sound has been tested in NEET helps you predict future question patterns. Over the last decade, examiners have shifted from purely formulaic questions to concept-application hybrids that require deeper understanding. This is why rote memorisation alone is insufficient — you need to practise applying Waves & Sound concepts in varied problem contexts.

For NEET, Waves & Sound questions are predominantly NCERT-based, but NTA increasingly tests conceptual understanding rather than direct recall. Pay special attention to NCERT examples, diagrams with labels, and the 'points to remember' sections at the end of each chapter.

MindPeak Institute offers personalised 1-on-1 coaching where expert mentors guide you through Waves & Sound and all other NEET Physics chapters. Our adaptive curriculum identifies your specific weak areas using performance analytics and creates a targeted study plan to maximise your score. Over 85% of MindPeak students report significant improvement within the first month of coaching.

NEET Physics Tips — Waves & Sound

  • Master the fundamental concepts of Waves & Sound before attempting complex problems. Build a concept map linking all sub-topics to see how they connect.
  • Practise questions at all difficulty levels — Easy for concept clarity, Medium for application, Hard for exam readiness. Spend 60% of your time on Medium-level questions as they mirror exam difficulty most closely.
  • Review solutions even for questions you answered correctly — you may discover faster methods that save 30-60 seconds per question, which adds up to 10+ minutes across the full paper.
  • Track your accuracy chapter-wise to identify and fix weak areas early. Aim for 80%+ accuracy on Easy, 60%+ on Medium, and 40%+ on Hard before the exam.
  • Create a personal error log for Waves & Sound: write down every mistake, the concept it tested, and the correct approach. Review this log weekly — it's the single most effective revision technique used by top rankers.
  • Time yourself while solving Waves & Sound questions. For NEET, aim for 2 minutes per question on average. If a question takes more than 4 minutes, mark it and move on — coming back with fresh eyes often reveals the solution.
  • For NEET Physics, ensure thorough NCERT coverage — 90%+ questions are NCERT-based. Read every line, including footnotes, figure captions, and 'Did You Know' boxes.
  • Pay special attention to diagrams, assertion-reason, and statement-based questions in Waves & Sound. NEET has increased the proportion of conceptual questions that test understanding rather than memorisation.
  • Memorise key tables, classifications, and exceptions in Waves & Sound — NTA frequently tests these in one-liner MCQs. Use mnemonics to retain complex lists and sequences.
  • For Physics, practise matching-type and sequence-ordering questions from Waves & Sound. These question formats have become more common in recent NEET papers and test comprehensive understanding.

Common Mistakes in Waves & Sound

One of the most common mistakes students make in Waves & Sound is confusing similar-looking formulas or applying them in the wrong context. For example, many aspirants mix up the conditions under which specific equations are valid, leading to incorrect answers even when the core concept is understood. This is particularly dangerous in NEET because the wrong options (distractors) are specifically designed using these common misapplications.

Another frequent error is skipping the units check. In NEET Physics, especially in Waves & Sound, dimensional analysis can instantly eliminate 1-2 wrong options. Students who skip this step lose easy marks that could have been secured with a 10-second verification. Developing the habit of checking units before finalising your answer is one of the simplest yet most impactful improvements you can make.

Rushing through Waves & Sound questions without drawing a diagram or writing down given data is a major time-waster. What feels like saving time actually leads to silly mistakes and re-reading the question multiple times. Top rankers consistently report that spending 15-20 seconds organising the problem saves 1-2 minutes overall. Always extract the given information, identify what's being asked, and plan your approach before calculating.

Many students over-rely on memorised shortcuts without understanding the derivation. While shortcuts are valuable in NEET, examiners in NEET frequently twist problems to test whether you truly understand Waves & Sound concepts — not just whether you can apply a formula mechanically. When a shortcut fails, students without conceptual understanding are completely stuck.

Sign errors and negative sign confusion account for 10-15% of all incorrect answers in Waves & Sound. Students often forget sign conventions, especially when dealing with vectors, directions, or energy changes in Waves & Sound. Always define your sign convention at the start of the problem and stick to it consistently throughout the solution.

Not reading all four options before solving is another critical mistake. In NEET, sometimes option analysis (working backwards from the answers) is faster than forward-solving. If the options are widely spaced, estimation or approximation can give you the correct answer in seconds. Smart option analysis is a skill that top NEET scorers develop through deliberate practice.

Finally, neglecting to revise Waves & Sound regularly leads to 'knowledge decay' — you understood it perfectly two months ago, but can't recall the approach during the exam. The forgetting curve shows that without active recall, you lose 60-70% of learned material within a week. Schedule spaced revision sessions for Waves & Sound at 1-day, 1-week, and 1-month intervals to lock it into long-term memory.

Key Formulas — Waves & Sound

Waves & Sound in Waves & Sound relies on a set of core formulas and principles that every NEET aspirant must internalise. These aren't just equations to memorise — understanding when and why each formula applies is what separates a 90th percentile scorer from a 99th percentile one. The best approach is to derive each formula at least once, understand its assumptions, and note the conditions where it breaks down.

The key to mastering Waves & Sound formulas is practice with variation. Solve the same concept across Easy, Medium, and Hard difficulty levels. Each level introduces new constraints and edge cases that deepen your formula intuition for NEET Physics. Easy questions test direct substitution, Medium questions require combining 2-3 formulas, and Hard questions demand creative application or derivation from first principles.

Pro tip: Create a one-page formula card for Waves & Sound and revise it every morning during your last 30 days before NEET. Spaced repetition of formulas has been shown to improve recall by 40-60% compared to last-minute cramming. MindPeak's formula sheets for NEET Physics are designed exactly for this purpose — concise, frequency-tagged, and exam-focused.

Beyond individual formulas, understanding the connections between formulas in Waves & Sound is crucial. Many NEET problems require chaining multiple concepts from Waves & Sound — recognising which formula to apply first and how to link it to the next step is a skill that only develops through sustained practice. Think of formulas as tools in a toolkit: knowing which tool to use for which job is as important as knowing how each tool works.

For NEET, formula application is typically more direct, but you must know the exact form and units of each formula in Waves & Sound. NTA sometimes tests whether you can recall the correct formula from memory — without it being given in the question — so regular revision of your formula card is non-negotiable.

View Complete Formula Sheet

Why Waves & Sound Matters for Your Exam

Waves & Sound from Waves & Sound is a high-yield area in NEET Physics. NTA data from the last decade reveals that Waves & Sound consistently contributes 3-6 questions in every NEET paper, making it one of the most important chapters for score maximisation. With each question worth 4 marks (and -1 for wrong answers), mastering Waves & Sound can add 12-24 marks to your score.

What makes Waves & Sound particularly valuable for NEET preparation is that questions are predominantly NCERT-based. Students who thoroughly read NCERT Physics textbooks and practise MCQs on Waves & Sound can secure these marks with relatively less effort compared to other competitive chapters. The key is complete NCERT coverage — including diagrams, examples, and exercise questions.

Strategic NEET preparation means prioritising high-frequency, NCERT-aligned chapters like Waves & Sound. By mastering Waves & Sound early in your preparation, you free up revision time for more challenging areas while locking in guaranteed marks on exam day. This approach — securing easy marks first, then building on them — is used by every NEET topper.

The marks from Waves & Sound are especially critical because NEET is decided by extremely thin margins. In NEET 2024, the difference between rank 1,000 and rank 5,000 was roughly 15-20 marks. Getting 3-4 extra questions right from a well-prepared chapter like Waves & Sound can dramatically improve your medical college options and seat allocation.

Recent NEET papers (2022-2025) show a trend toward testing deeper understanding of Waves & Sound rather than simple factual recall. NTA is increasingly using application-based, assertion-reason, and matching-type questions from Waves & Sound. This makes conceptual practice — not just memorisation — essential for scoring well on this chapter.

More Waves & Sound PYQs

Q1The speed of sound in air at 0°C is approximately:Q2In a closed organ pipe, the fundamental frequency corresponds to:Q3Beats are produced when two waves have:Q4The Doppler effect causes apparent frequency to increase when:Q5Velocity of transverse wave on a string is:Q7The intensity of a sound wave is proportional to:Q8Ultrasonic waves are sound waves with frequency:Q9An open organ pipe of length L has fundamental frequency:Q10The equation of a progressive wave is y = A sin(ωt − kx). Its velocity is:Q11Resonance in a vibrating system occurs when driving frequency equals:

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Study Strategy — Waves & Sound

The most effective NEET preparation strategy for Waves & Sound in Waves & Sound is the "NCERT-first" approach. Read the relevant NCERT chapter line by line, highlighting key definitions, exceptions, and diagram labels. Then close the book and write down everything you remember. Compare with the original — the gaps reveal exactly what you need to revise. This active recall technique is 4x more effective than re-reading.

After completing NCERT, solve 20-30 MCQs on Waves & Sound at Easy difficulty to build confidence and identify any remaining conceptual gaps. Then progress to Medium and Hard questions that test application and analytical thinking. MindPeak's NEET practice sets follow this exact progression for Waves & Sound.

For NEET Physics, visual learning is critical. Create hand-drawn diagrams, flowcharts, and comparison tables for Waves & Sound. NTA frequently tests diagram-based questions where you need to identify structures, label parts, or match components. Students who practise drawing and labelling diagrams score 15-20% higher on these question types.

Schedule regular revision of Waves & Sound using the spacing effect: review your notes at 1 day, 3 days, 1 week, 2 weeks, and 1 month after initial study. Each revision session should be shorter (15-20 minutes of rapid recall + 10 MCQs). By exam day, Waves & Sound will be firmly embedded in your long-term memory, accessible even under exam stress.

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