Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

Concepts Of Physics MCQ Edition [Volume 1]

Exam: Concepts Of Physics MCQ Edition [Volume 1]
Subject: Physics
Chapter: Some Mechanical Properties of Matter

Concepts Of Physics MCQ Edition [Volume 1] · Physics · Some Mechanical Properties of Matter

Determine the excess pressure inside a soap bubble having a radius...

Determine the excess pressure inside a soap bubble having a radius of

4 \text{ mm}

. The surface tension of the soap solution is given as

0.03 \text{ N/m}

.

Options

A $7.5 \text{ N/m}^2$
B $30 \text{ N/m}^2$
C $15 \text{ N/m}^2$
D $60 \text{ N/m}^2$

Correct answer

B. $30 \text{ N/m}^2$

Step-by-step solution

The excess pressure inside a soap bubble is given by the formula:

\Delta P = \dfrac{4T}{R}

where

T

is the surface tension and

R

is the radius of the bubble.

Given

T = 0.03 \text{ N/m}

and

R = 4 \text{ mm} = 4 \times 10^{-3} \text{ m}

.

Substituting the values:

\Delta P = \dfrac{4 \times 0.03}{4 \times 10^{-3}}

\Delta P = \dfrac{0.03}{10^{-3}} = 30 \text{ N/m}^2

Practice Some Mechanical Properties of Matter on Quantrex Academy →

More from Some Mechanical Properties of Matter

A load of 10 kg is suspended by a metal wire that is 3 m long and possesses a… Concepts Of Physics MCQ Edition [Volume 1]A vertical metal cylinder of radius 2 cm and length 2 m is fixed at its lower end, and a… Concepts Of Physics MCQ Edition [Volume 1]A vertical metal cylinder of radius 2 cm and length 2 m is fixed at its lower end, and a… Concepts Of Physics MCQ Edition [Volume 1]A load of 10 kg is suspended by a metal wire that is 3 m long and possesses a… Concepts Of Physics MCQ Edition [Volume 1]A load of 10 kg is suspended by a metal wire that is 3 m long and possesses a… Concepts Of Physics MCQ Edition [Volume 1]A vertical metal cylinder of radius 2 cm and length 2 m is fixed at its lower end, and a… Concepts Of Physics MCQ Edition [Volume 1]Steel has an elastic limit of 8 × 10^8 N/m^2 and a Young modulus of 2 × 10^ 11 N/m^2 .… Concepts Of Physics MCQ Edition [Volume 1]A steel wire and a copper wire, both possessing equal length and equal cross-sectional… Concepts Of Physics MCQ Edition [Volume 1] Full Some Mechanical Properties of Matter list All Concepts Of Physics MCQ Edition [Volume 1] PYQs