"Charged Balloon Expands When Blown Up

  • #1

Homework Statement

The charged balloon expands as it is blown up, increasing in size.

Here is a link. It is question 15.


Homework Equations

The Attempt at a Solution

Is that answer correct? Because what I was thinking was since the balloon surface area was increasing then the density decreases hence all the points are decreasing? Am I wrong and the answer provided in the link correct?
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  • #2
The answer there is correct.
The density is decreasing, but the surface area is increasing.
  • #3
Thank you!

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