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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 5 September 2020, Shift 1, Physics Q20

Question 20 of 75 in this shift, Physics question 20 of 25.

In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from bottom, it resonates with a given tuning fork. When the water level is raised the next resonance with the same tuning fork occurs at a height of 24.5 cm. If the velocity of sound in air is 330 m/s, the tuning fork frequency is :
  1. (1)1100 Hz
  2. (2)550 Hz
  3. (3)3300 Hz
  4. (4)2200 HzOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter
Waves
Topic
Resonance in Air Columns
Idea tested
End Correction Concept

Same idea in other shifts

Asked 2× in all
  1. 25 Feb 2021, Shift 1 · Q4A student is performing the experiment of resonance column. The diameter of the column tube is 6 cm. The frequency of the tuning fork is…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.