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A soap bubble is charged to a potential ...

A soap bubble is charged to a potential of 16V. Its radius is doubled. Then the potential of the bubble now become .

A

16 V

B

8 V

C

4 V

D

2 V

Text Solution

Verified by Experts

The correct Answer is:
B
Potential on bubble , ` V = (1)/(4pi in _0) (q)/( r ) `
` therefore " " (V_1)/(V_2) = (r_2)/(r_1)`
`rArr " " (16)/(V_2) = (2)/(1)`
` rArr " " V_2 = 8 V`
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