In air, a charged soap bubble of radius r is in equilibrium having outside and inside pressures being equal. The charge on the drop is ( 
permittivity of free space, T = surface tension of soap solution)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Excess pressure inside the soap bubble is
As the pressure inside and outside is the same, so pressure of the charged bubble is
where σ is the surface charge density of the bubble
Charge on the bubble is
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
An electron of mass ' m ' and charge ' q ' is accelerated from rest in a uniform electric field of …
The electric flux linked with the closed surface in is
Identify the WRONG statement in the case of electric field lines.
An electron of mass ' m e ' and a proton of mass ' m', are kept in a uniform electric field. The ra…
If E a and E q represent the electric field intensity due to a short dipole at a point on its axial…
Two concentric spheres kept in air have radii R and r. They have similar charge and equal surface c…