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Saturday, 31 October

JEE Main · Physics · Waves

Sonometer Laws

JEE Main asked Sonometer Laws 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2021, 2023 and 2024. It belongs to Waves on Strings, in Waves (Physics). The longest wait between two years asking it was 2 years. In 2020 and 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
4 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.17’200.03’210’220.14’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 2 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20241 of 18
  • 20232 of 12
  • 20220 of 24
  • 20211 of 24
  • 20202 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Sonometer mass from frequencies
  • String length from fundamental frequency

Difficulty

Easy 5Medium 1Hard 0

3 of the 6 questions had a numerical answer.

Every question

All 6 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 5 Apr 2024, Shift 2 · Q55A sonometer wire of resonating length 90 cm has a fundamental frequency of 400 Hz when kept under some tension. The resonating length of…EasyNumerical value
  2. 13 Apr 2023, Shift 2 · Q54In an experiment with sonometer when a mass of 180 g is attached to the string, it vibrates with fundamental frequency of 30 Hz. When a…EasyNumerical value
  3. 8 Apr 2023, Shift 2 · Q51A guitar string of length 90 cm vibrates with a fundamental frequency of 120 Hz. The length of the string producing a fundamental…EasyNumerical value
  4. 4 Aug 2021, Shift 2 · Q11The tension in a string is increased by 44%. If its frequency of vibration is to remain unchanged, its length must be increased byEasySingle correct
  5. 2 Sep 2020, Shift 1 · Q10Two identical strings XX and ZZ made of same material have tension TXT_X and TZT_Z in them. If their fundamental frequencies are 450 Hz…EasySingle correct
  6. 9 Jan 2020, Shift 2 · Q11A wire of length LL and mass per unit length 6.0×10−3 kg m−16.0\times10^{-3}\ \mathrm{kg\,m^{-1}} is put under tension of 540 N. Two consecutive…MediumSingle correct

Shifts: 9 Jan 2020, Shift 2, 2 Sep 2020, Shift 1, 4 Aug 2021, Shift 2, 8 Apr 2023, Shift 2, 13 Apr 2023, Shift 2, 5 Apr 2024, Shift 2.

Same topic

Other ideas in Waves on Strings

Waves on Strings has 14 ideas JEE Main has asked; 5 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas