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Grade 8Electrostatics

A soap bubble is given a negative charge, then it's radius
Decrease
Increase
Unchanged or nothing can be predicted.?

Profile image of Halls
7 Years agoGrade 8
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1 Answer

Profile image of Arun
7 Years ago
In an uncharged soap bubble, there is an equilibrium between positive and negative charges.
When there are like charges on the surface of the bubble(negative charge in this case), the equilibrium is lost. To attain this lost equilibrium, the charges start repelling each other. These charges will end up increasing the surface area of the bubble. I hope you are able to visualize what's happening.
When the surface area increases, the bubble expands, increasing the radius.

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