Under isothermal condition, energy E is supplied to a soap bubble of surface Tension sigma and radius r, to double the radius of bubble, then E is

Under isothermal condition, energy E is supplied to a soap bubble of s

1.	Under isothermal condition, energy E is supplied to a soap bubble of surface Tension sigma and radius r, to double the radius of bubble, then E is
Answer» `16 pi r^(2) sigma` `24pi r^(2) sigma` `8 pi r^(2) sigma` `12 pi r^(2) sigma` Answer :B