A soap bubble has radius R, charge Q, surface tension T. Find the exc…

$\frac{32 \pi^2 R^2 \varepsilon_0 T-q^2}{32 \pi^2 R^4 \varepsilon_0}$

$\frac{64 \pi^2 R^3 \varepsilon_0 T-q^2}{32 \pi^2 R^4 \varepsilon_0}$

$\frac{128 \pi^2 R^3 \varepsilon_0 T-q^2}{32 \pi^2 R^4 \varepsilon_0}$

none of these