NEET Waves PYQ practice sheet

5 previous-year NEET Physics questions from Waves, newest papers first. Waves carries 6 of the Physics questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

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

   • (A)
     $\frac{5}{9}$
   • (B)
     $1$
   • (C)
     $\frac{9}{5}$
   • (D)
     $\frac{3}{5}$
2. 2.

   NEET 2026

   For a travelling harmonic wave $y(x,t)=2.0\cos2\pi(10t-0.0080x+0.35)$, 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 $0.5$ m is:

   • (A)
     $8\pi$ rad
   • (B)
     $0.8\pi$ rad
   • (C)
     $0.08\pi$ rad
   • (D)
     $0.008\pi$ rad
3. 3.

   NEET 2023

   The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is :

   • (A)
     3 : 1
   • (B)
     1 : 2
   • (C)
     2 : 1
   • (D)
     1 : 3
4. 4.

   NEET 2022

   If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:

   • (A)
     1 : 2
   • (B)
     1 : 1
   • (C)
     $\sqrt{2}:1$
   • (D)
     $1:\sqrt{2}$
5. 5.

   NEET 2020

   In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency $6$ Hz. When tension in B is slightly decreased, the beat frequency increases to $7$ Hz. If the frequency of A is $530$ Hz, the original frequency of B will be :

   • (A)
     523 Hz
   • (B)
     524 Hz
   • (C)
     536 Hz
   • (D)
     537 Hz