Radius of a soap bubble is 'r', surface tension of soap solution is T. Then without increasing the temperature, how much energy will be needed to double its radius

Question:

2.Radius of a soap bubble is ‘r’, surface tension of soap solution is T. Then without increasing the temperature, how much energy will be needed to double its radius

Options :

a) 4 πr^2T
b) 2 πr^2T
c) 12 πr^2T
d) 24 πr^2T

Answer :

d) 24 πr^2T

Answer Steps :

Solution :-

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