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

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

Grade:8

1 Answers

Arun
25750 Points
5 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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