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Beats for JEE: 14 solved questions

Real JEE paper questions on beats, part of waves. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2002 to 2026. No sign-in needed to read them.

What this topic asks

• Unknown fork frequency and tuning — 8 questions
• Beat frequency — 6 questions

All 14 questions with solutions

• In a resonance experiment two air columns closed at one end, of lengths 100 cm and 120 cm, give 15 beats per… JEE Main 3rd April 2nd Shift 2025
• Two harmonic waves moving in the same direction superpose to give x=a cos(1.5t)cos(50.5t), with t in seconds.… JEE Main 7th April 1st Shift 2025
• The velocity of sound in a gas in which two wavelengths 4.08 m and 4.16 m produce 40 beats in 12 s is JEE Main 28th June 1st Shift 2022
• Which figure shows, schematically, the wave pattern produced by the superposition of two waves of frequencies… JEE Main 10th April 2nd Shift 2019
• Five beats per second are heard when a tuning fork is sounded with a sonometer wire under tension, for a wire… JEE Main Online 2018
• Two sitar strings A and B playing the note 'Dha' are slightly out of tune and produce beats of frequency 5 Hz… JEE Main Online 2018
• Three sound waves of equal amplitude have frequencies ( u-1), u and ( u+1). They superpose and give beats. Th… JEE Main 2009
• Two tuning forks sounded together give 4 beats per second. Tape is then attached to a prong of fork 2, and th… JEE Main 2005
• A tuning fork of frequency 256 Hz makes 5 beats per second with a vibrating piano string. When the tension in… JEE Main 2003
• A pair of tuning forks produces 4 beats per second, one fork having frequency 288 cps. A little wax is placed… JEE Main 2002
• Two tuning forks A and B sounded together give 8 beats in 2 s. When fork A is loaded with wax the beat freque… JEE Main 28th Jan 2nd Shift 2026
• A tuning fork resonates with a sonometer wire of length 1 m under a tension of 6 N. When the tension is chang… JEE Main 1st Feb 1st Shift 2024
• A closed organ pipe 150 cm long gives 7 beats per second with an open organ pipe 350 cm long, both vibrating… JEE Main 27th Jan 2nd Shift 2024
• A set of 20 tuning forks is arranged in order of increasing frequency, each fork giving 4 beats per second wi… JEE Main 26th June 2nd Shift 2022