Q. If a soap bubble expands, the pressure inside the bubble :
A) is equal to the atmospheric pressure
B) decreases
C) increases
D) remains the same
Explanation
[Solution] Excess pressure $= 4T/r$; as r increases, the inside pressure decreases. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.