JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 27 July 2022, Shift 2, Physics Q58

Question 58 of 90 in this shift, Physics question 28 of 30, Section B.

A spherical soap bubble of radius 3 cm is formed inside another spherical soap bubble of radius 6 cm. If the internal pressure of the smaller bubble of radius 3 cm in the above system is equal to the internal pressure of the another single soap bubble of radius r cm. The value of r is ___________.

Official answer

NTA final key.

Chapter: Mechanical Properties of Fluids
Topic: Surface Tension
Idea tested: Excess Pressure in Soap Bubbles

Same idea in other shifts

Asked 6× in all

3 Apr 2025, Shift 2 · Q47The excess pressure inside a soap bubble A in air is half the excess pressure inside another soap bubble B in air. If the volume of the…EasyNumerical value
6 Apr 2024, Shift 2 · Q38Pressure inside a soap bubble is greater than the pressure outside by an amount : (given : $R$ = Radius of bubble, $S$ = Surface tension…EasySingle correct
8 Apr 2024, Shift 1 · Q53A liquid column of height 0.04 cm balances excess pressure of a soap bubble of certain radius. If density of liquid is…MediumNumerical value
9 Apr 2024, Shift 2 · Q39The excess pressure inside a soap bubble is thrice the excess pressure inside a second soap bubble. The ratio between the volume of the…EasySingle correct
3 Sep 2020, Shift 1 · Q6Pressure inside two soap bubbles are 1.01 and 1.02 atmosphere, respectively. The ratio of their volumes is :EasySingle 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.