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In Milikan's oil drop experiment, an oil...

In Milikan's oil drop experiment, an oil drop of radius `r` and charge `q` is held in equilibrium between the plates of as charged parallell plate capacitor when the potential difference is `V`. To keep as drop of radius `2`r and with a charge `2q` in equilibrium between the plates the potential difference `V` required is

A

V

B

2V

C

4V

D

8V

Text Solution

Verified by Experts

The correct Answer is:
3
`qE=mg`
`q((DeltaV)/(d))=(4)/(3)pir^(3)pg`
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