Q. A soap bubble is given a negative charge, then its radius
A) Decreases
B) Increases
C) Remains unchanged
D) Nothing can be predicted as information is insufficient
Explanation
(b) Every system tends to decrease its potential energy to attain more stability when we increase charge on soap bubble its radius increases $\left\lbrack U \propto \frac{1}{r} \right\rbrack$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.