NCERT Physics
Class XI
Chapter 14

True–False Concept Check: Waves

Quick conceptual diagnostics for mastering wave physics and avoiding common mistakes in competitive exams.

Why This Section Matters
🧠
Concept Clarity
Every statement forces the brain to test physics logic instead of memorizing formulas.
⚡
Faster Problem Solving
Clear concepts reduce time spent interpreting numerical questions.
🎯
Exam Accuracy
Avoid conceptual traps commonly used in entrance exam MCQs.
🔬
Physics Thinking
Students learn to evaluate statements like scientists.
Learning Impact Analytics
45%
Better Concept Retention
30%
Faster Question Solving
40%
Reduction in Concept Errors
2×
Improved Concept Recall
Importance for Competitive Exams
🏆
IIT-JEE
Conceptual traps in wave interference, Doppler effect, and standing waves appear frequently.
🩺
NEET
Wave speed relation and sound propagation concepts often appear in conceptual MCQs.
📘
Board Exams
True-False type conceptual understanding improves descriptive answers.
🎓
Olympiads
Strong conceptual foundations help in higher level physics problems.
How to Use These Statements
Step 1: Attempt every statement before checking answers.
Step 2: Justify your answer using wave laws or formulas.
Step 3: Identify the concept behind the statement.
Step 4: Revise the related NCERT section immediately.
Your Progress 0 / 25 attempted
Q 01 / 25
A wave transfers energy from one point to another without permanent transfer of matter.
Q 02 / 25
Sound waves can travel through vacuum.
Q 03 / 25
In a transverse wave, particles of the medium vibrate perpendicular to the direction of wave propagation.
Q 04 / 25
In longitudinal waves, compressions correspond to regions of low pressure.
Q 05 / 25
The wavelength of a wave is the distance between two successive compressions or two successive crests.
Q 06 / 25
The frequency of a wave depends on the properties of the medium.
Q 07 / 25
The speed of a wave is given by the product of its frequency and wavelength.
Q 08 / 25
All electromagnetic waves are longitudinal in nature.
Q 09 / 25
Reflection of waves obeys the same laws as reflection of light.
Q 10 / 25
When a wave reflects from a rigid boundary, it undergoes phase reversal.
Q 11 / 25
Superposition of waves violates the principle of conservation of energy.
Q 12 / 25
When two waves of equal amplitude and opposite phase interfere, the resultant displacement is zero.
Q 13 / 25
Standing waves are formed due to the superposition of two waves traveling in opposite directions with the same frequency and amplitude.
Q 14 / 25
In a standing wave, all particles of the medium vibrate with the same amplitude.
Q 15 / 25
The distance between two successive nodes in a standing wave is equal to half the wavelength.
Q 16 / 25
Beats are observed when two waves of slightly different frequencies interfere.
Q 17 / 25
The beat frequency is equal to the average of the two interfering frequencies.
Q 18 / 25
Doppler effect is observed only for sound waves.
Q 19 / 25
In Doppler effect, if the source and observer are both at rest, no frequency shift is observed.
Q 20 / 25
The apparent frequency increases when the source moves away from the observer.
Q 21 / 25
In stationary waves, there is no net transfer of energy along the medium.
Q 22 / 25
The fundamental frequency of a stretched string is inversely proportional to its length.
Q 23 / 25
Increasing the tension in a stretched string increases the speed of transverse waves on it.
Q 24 / 25
In an organ pipe closed at one end, only odd harmonics are present.
Q 25 / 25
The Doppler shift formula for sound remains valid even when the speed of the source exceeds the speed of sound in the medium.
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