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NEET & JEE · Physics · Class 11

Waves — NEET & JEE 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.

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

Other NEET Physics chapters

Units and MeasurementMotion in a Straight LineMotion in a PlaneLaws of MotionWork Energy and PowerSystems of Particles and Rotational Motion

All 28 chapters →

Questions

How many NEET and JEE 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 and JEE 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.