Waves NEET PYQs (1995–2026)

Solved Waves PYQs

3 recent questions with answers. The full set of 77 is free to practise.

1. NEET 2026HardStanding Waves
   Q1

   For sound waves, if the number of nodes for the $5^{\text{th}}$ harmonic of an open-ended pipe is $n$ and that for the $9^{\text{th}}$ harmonic of the same pipe with one of its ends closed is $m$, the ratio $\frac{n}{m}$ is:

   • A$\frac{5}{9}$
   • B$\frac{9}{5}$
   • C1
   • D$\frac{3}{5}$

   Show answer & solution

   Correct answer: (C)

   C
2. NEET 2026MediumWave Equation & Types
   Q2

   For a travelling harmonic wave
   
   $y(x,t)=2.0\cos 2\pi (10t-0.0080x+0.35)$, where $x$ and $y$ are in cm and $t$ in s. The phase difference between oscillatory motion of two points separated by a distance of $0.5m$ is:

   • A$0.08\pi$ rad
   • B$0.8\pi$ rad
   • C$8\pi$ rad
   • D$0.008\pi$ rad

   Show answer & solution

   Correct answer: (B)

   Total phase
   
   $\varphi =20\pi t-2\pi \times 8\times 10^{-3}x+2\pi \times 0.35$.
   
   $\Delta \varphi =k\Delta x=2\pi \times 8\times 10^{-3}\times \Delta x$.
   
   $\Delta x=0.5$ m = 50 cm.
   
   $$\Delta \varphi =2\pi \times 8\times 10^{-3}\times 50=2\pi \times 0.4=0.8\pi$$
   
   rad.
3. NEET 2024MediumPrinciple of Superposition
   Q3

   Two slits in Young's double slit experiment are 1.5 mm apart and the screen is placed at a distance of $1m$ from the slits. If the wavelength of light used is $600\times 10^{-9}m$ then the fringe separation is [2024]

   • A$4\times 10^{-5}m$
   • B$9\times 10^{-8}m$
   • C$4\times 10^{-7}m$
   • D$4\times 10^{-4}m$

   Show answer & solution

   Correct answer: (D)

   Fringe width $=$ Fringe separation $(\beta )=\frac{\lambda D}{d}$
   $$\Rightarrow \beta =\frac{600\times 10^{-9}\times 1}{1.5\times 10^{-3}}=\frac{6\times 10^{-7}}{1.5\times 10^{-3}}=4\times 10^{-4}m$$

Topic-wise question count

Where NEET has asked from Waves, most frequent first.

• Standing Waves19
• Wave Equation & Types16
• Doppler Effect in sound13
• Beats11
• Speed of Wave on String & in Sound9
• Principle of Superposition8
• Reflection & Transmission of Waves1

Year-wise Waves questions in NEET

Number of questions from this chapter in each year's paper(s).