Question

a soap bubble is given a negative charge then it's radius​

Answer 1

Explanation:

A soap bubble is given a negative charge, then its radius. ... Due to mutual repulsion of charges distributed on the surface of bubble

What happens to the radius of a soap bubble if it is positively charged?

if a soap bubble is given some positive charge then its radius increases. The bubble will expand because the charged particles uniformly distributed on it cause them to repel each other due to the electrostatic force. This will happen to both positive and negatively charged bubbles because of the charge on it.