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  • Twenty seven drops of water of the same size are equally and similarly changed. They are then united to form a bigger drop. By what factor will the electrical potential changes. -<div class='qn

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

Option: 1

9 times


Option: 2

27 times


Option: 3

 6 times


Option: 4

3 times


Answers (1)

best_answer

Let V_{B} is the potential of bigger drop and V_{S} potential of small drop.

use, V_{B}=n^{2 / 3} V_{s}\quad -(1)

but n=27. put in (1) we get-

V_{B}=(27)^{2 / 3} V_{s}
V_{B}=\left(3^{3}\right)^{2 / 3} V_{s}=3^{2} V_{s}

V_{B}=9 V_{S} \rightarrow 9 \, \text{times} Ans.

Posted by

Irshad Anwar

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