Q24.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 _____
What This Question Tests
This question involves calculating the excess pressure inside two concentric soap bubbles and equating it to the excess pressure of a single equivalent bubble to find its radius.
Concepts Tested
Formulas Used
ΔP = 4T/R (for a single soap bubble)
ΔP = 2T/R (for a liquid drop/air bubble in liquid)
📚 NCERT Sections This Tests
2.4 — A Spherical Conductor Of Radius 12 Cm Has A Charge Of 1.6 × 10–7C
Physics Class 11 · Chapter 2
2.4 A spherical conductor of radius 12 cm has a charge of 1.6 × 10–7C distributed uniformly on its surface. What is the electric field (a) inside the sphere (b) just outside the sphere (c) at a point 18 cm from the centre of the sphere?
2.2 — A Regular Hexagon Of Side 10 Cm Has A Charge 5 Mc At Each Of Its
Physics Class 11 · Chapter 2
2.2 A regular hexagon of side 10 cm has a charge 5 mC at each of its vertices. Calculate the potential at the centre of the hexagon.
12.7 — The Radius Of The Innermost Electron Orbit Of A Hydrogen Atom Is
Physics Class 12 · Chapter 12
12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
📋 Question Details
- Chapter
- Properties of Matter
- Topic
- Surface Tension - Excess Pressure in Soap Bubbles
- Year
- 2022
- Shift
- 27 Jul Shift 2
- Q Number
- Q24
- Type
- Numerical
- NCERT Ref
- Class 11 Physics Ch 10: Mechanical Properties of Fluids
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