Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JIPMER 2005

Exam: JIPMER
Year: 2005
Subject: Physics
Chapter: Mechanical Properties of Fluids

JIPMER 2005 · Physics · Mechanical Properties of Fluids

The radius R of the soap bubble is doubled under isothermal...

The radius

R

of the soap bubble is doubled under isothermal condition. If

T

be the surface tension of soap bubble. The work done in doing so is given by

Options

A $32 \pi R^2 T$
B $24 \pi R^2 T$
C $8 \pi R^2 T$
D $4 \pi R^2 T$

Correct answer

A. $32 \pi R^2 T$

Step-by-step solution

Initial surface energy

w_1=2 \times 4 \pi R^2 T=8 \pi R^2 T

Final surface energy

w_2=2 \times 4 \pi(2 R)^2 T=32 \pi R^2 T

Practice Mechanical Properties of Fluids on Quantrex Academy →

More from Mechanical Properties of Fluids

In the measurement of viscosity of liquids using terminal velocity experiment, spherical… NEET 2026 A submarine is designed to withstand an absolute pressure of 100 atm. How deep can it go… NEET 2026 Water flows in a streamline motion through a horizontal pipe of circular cross-section as… NEET 2026 Consider a water tank shown in the figure. It has one wall at x=L and can be taken to be… NEET 2025 A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If… NEET 2024 An ideal fluid is flowing in a non-uniform cross-sectional tube X Y (as shown in the… NEET 2024 The amount of energy required to form a soap bubble of radius 2cm from a soap solution is… NEET 2023 The viscous drag acting on a metal sphere of diameter 1 ~mm , falling through a fluid of… NEET 2023 Full Mechanical Properties of Fluids list All JIPMER PYQs