Electrostatics Question 46
Question: 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 [MP PET 1991; MP PMT 1994; RPET 2001]
Options:
A) 9 times
B) 27 times
C) 6 times
D) 3 times
Show Answer
Answer:
Correct Answer: A
Solution:
$ V _{Big}={{n}^{2/3}}.v _{small} $
therefore $ V _{Big}={{(27)}^{2/3}}.v _{small}=9v _{small} $
