A spherical balloon is initially uncharged. If you spread positive charge uniformly over the balloon's surface...

A spherical balloon is initially uncharged. If you spread positive charge uniformly over the balloon's surface would it expand or contract? What would happen if you spread negative charge instead?

According to my TA the correct answer is when it's positive charge it expands and when it's negative charge it contracts.

What is the reasoning behind this? Please explain.

Expert Solution

Whether you spread positive or negative charge over the surface of the balloon, the balloon would expand because like charges repel.

When you spread positive charge over the balloon's surface it will expands because all of its partice becomes positively charged and they would repel each other and hence the balloon expands.

Similarly When you spread negative charge over the balloon's surface it will expands because all of its partice becomes negatively charged and they would repel each other and hence the balloon expands.

genius_generous answered 2 years ago

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