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CBSE Class 12-science Answered

when a conducting soap bubble is negatively charged then
a. its size starts varying arbitarily
b. it expands
c. it contracts
d. no change in its size takes place
Asked by dilipdevesh1170 | 07 Jun, 2016, 08:32: PM
answered-by-expert Expert Answer
The soap bubble is conducting. So, when a negative charge is applied on it, this charge will distribute itself on the surface of the bubble.
So, there is a net negative charge on the soap bubble. Now, each individual charges will repel each other and the radius of the bubble increases.
Therefore, when a conducting soap bubble is negatively charged, it expands.
Answered by Romal Bhansali | 09 Jun, 2016, 10:43: AM
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