question_answer

Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (Surface tension of soap solution\[=0.03\,\,N{{m}^{-1}}\])                                                                                  [AIEEE 2011]

A)        \[0.4\,\,\pi \] m J           

B)       \[4\,\,\pi \] m J C)  \[0.2\,\,\pi \] m J D)                  \[2\,\,\pi \] m J Correct Answer: A Solution : [a]