SECTION 2 (Maximum Marks : 15)
• This section contains FIVE questions
• The answer to each question is a single Digit integer ranging from 0 to 9, both inclusive
• For each question, marks will be awarded in one of the following categories:
Full Marks : +3 If only the bubble corresponding to the correct answer is darkened
Zero Marks : 0 In all other cases
A drop of liquid of radius R = 10 -2 m having surface tension 
divides itself into K identical drops. In this process the total change in the surface energy 
U = 10 -3 J. If K = 
then the value of a is
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