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NEET & JEE · Physics · Class 11

Waves — NEET Physics MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

Which statement is true of every mechanical wave?
  1. It requires a material medium ✓
  2. It travels through vacuum at light speed
  3. It transports the medium bodily with the disturbance
  4. It must be transverse
Answer: A. Mechanical waves rely on inertia and elastic coupling of material constituents and therefore need a medium.
Why not B: Electromagnetic waves travel through vacuum; mechanical waves cannot.
Why not C: Medium particles oscillate locally while the disturbance and energy propagate.
Why not D: Sound in fluids is a familiar longitudinal mechanical wave.
For y=0.0200 sin(4.00x−20.0t) m in SI units, what is amplitude?
  1. 4.00 m
  2. 20.0 m
  3. 0.0200 m ✓
  4. 0.0800 m
Answer: C. Comparing with a sin(kx−ωt), the amplitude is a=0.0200 m.
Why not A: The spatial coefficient is wave number, not displacement amplitude.
Why not B: The time coefficient is angular frequency, not amplitude.
Why not D: This multiplies amplitude by wave number and obtains a dimensionless slope scale.
A 1.00 m string fixed at both ends supports waves at 100 m s⁻¹. What is its third-harmonic frequency?
  1. 150 Hz ✓
  2. 50.0 Hz
  3. 300 Hz
  4. 100 Hz
Answer: A. ν_n=nv/(2L), so ν₃=3×100/(2×1.00)=150 Hz.
Why not B: This is the fundamental v/(2L), not the third harmonic.
Why not C: This uses nv/L and omits the factor two for fixed ends.
Why not D: This is the second harmonic of the string.

These are 3 of the 30 questions in the test. Take the full chapter test →

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Every NCERT question in this chapter is solved, free: NCERT solutions — Waves →

Other NEET Physics chapters

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Questions

How many NEET questions are there on Waves?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 11 chapter.

Is this NEET Physics chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.