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Q.

Twenty seven drops of water of the same size are equally and similarly charged. They are then united to form a bigger drop. By what factor will the electrical potential changes

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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

9 times

b

27 times

c

6 times

d

3 times 

answer is A.

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Detailed Solution

VBig=n2/3⋅vsmall⇒VBig=(27)2/3⋅vsmall=9vsmall

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