AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

A soap film is made by dropping a circular frame of radius b in soap solution. A bubble is formed by blowing air with speed $v$ in the form of a cylinder. Air stops after striking surface of soap bubble. Density of air is $ρ$ . The radius of the bubble is R>b. The radius R of the bubble when the soap bubble separates from the ring is $\frac{β T}{ρ v^{2}}$ Find the value of $β$ . (where, T is the surface tension of the liquid)

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

answer is 4.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Mass of air entering in 1s is $m = π b^{2} v ρ$

Change in momentum in $1 s = m v - 0 = π b^{2} ρ v^{2}$

Thus, $F = π b^{2} ρ v^{2}$

Pressure due to this force is $Δ p = \frac{F}{A} = \frac{π b^{2} ρ v^{2}}{π b^{2}} = ρ v^{2}$

When this excess pressure equals to $\frac{4 T}{R},$ the bubble gets separated

$∴ ρ v^{2} = \frac{4 T}{R} \Rightarrow R = \frac{4 T}{ρ v^{2}}$
So, $β = 4$ .

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!