Radius of a soap bubble is increased from R to 2R, work done is this process in terms of surface tension is

Question

Radius of a soap bubble is increased from R to 2R, work done is this process in terms of surface tension is (A)  24π R2T  (B)  12Tπ r2  (C)  6Tπ r2  (D)  4Tπ r2

Tardigrade Admin · Accepted Answer

W=T.Δ A =T.[4π (2n2-4π r2)] =12Tπ r2

Q. Radius of a soap bubble is increased from $R$ to $2 R$ , work done is this process in terms of surface tension is

$24 π R^{2} T$

$12 T π r^{2}$

$6 T π r^{2}$

$4 T π r^{2}$

$W = T .Δ A$
$= T . [4 π (2 n^{2} - 4 π r^{2})]$
$= 12 T π r^{2}$

Q. Radius of a soap bubble is increased from R to 2R, work done is this process in terms of surface tension is

24πR2T

12Tπr2

6Tπr2

4Tπr2

W=T.ΔA =T.[4π(2n2−4πr2)] =12Tπr2

Q. Radius of a soap bubble is increased from $R$ to $2 R$ , work done is this process in terms of surface tension is

$24 π R^{2} T$

$12 T π r^{2}$

$6 T π r^{2}$

$4 T π r^{2}$

$W = T .Δ A$
$= T . [4 π (2 n^{2} - 4 π r^{2})]$
$= 12 T π r^{2}$